How many NAS drive bays do you need?

F6-424: six native SATA trays, two separate M.2 cache sockets

The F6-424 has six native SATA bays and two M.2 cache sockets; the next whole-bay floor of seven excludes it. The M.2 sockets do not create another SATA tray, and although the page gives a 132TB raw example, the current official compatibility table lists 32TB and 30TB drive models as Recommended for F6-424. That row list alone does not prove a supported six-drive combination, so this guide claims no settled raw or usable ceiling. The distinct standard F4-425 has exactly four native SATA positions; its four-tray count meets a four-bay floor, not five. Check the exact F4-425 bay limits and apply a four-bay floor or test the five-bay boundary. Review the exact F6-424 bay and capacity evidence; apply the same six-bay floor or test the seven-bay boundary.

A seven-native-bay requirement excludes the F6-424 because it has six SATA trays, not seven; its two M.2 sockets are specified separately for caching. One different eight-bay candidate in the reviewed library is the QNAP TS-873A-8G-US. Use the same seven-bay floor to see every matching model.

Historical rack NAS bay thresholds: count the actual positions

With earlier models included, each reviewed TS-877XU configuration meets an eight-native-bay floor and fails a nine-bay floor: QNAP specifies eight SATA trays for the RP-2600-8G, RP-1200-4G and standard 1200-4G. Their distinct CPU, memory and PSU fields stay on the separate reviews. Use the same include-earlier choice at eight bays or change only the floor to nine.

The exact ES1640dc v2 E5-96G selector counts 16 SAS positions, so it meets a 16-bay floor and fails 17; the older manual’s 12-large-plus-four-cache layout remains a format conflict, not four extra positions. Read the ES1640dc v2 assessment, then compare the same earlier-inclusive 16-bay screen with a 17-bay floor.

The original TDS-16489U-SB2 has 20 documented physical internal positions—16 front 3.5-inch bays plus four rear 2.5-inch SSD-only positions—so it meets a 20-position floor and fails 21. The rear four are not general-purpose HDD trays. Read the SB2 assessment and use the same earlier-inclusive 20-position floor or raise only the floor to 21.

The original TDS-h2489FU-4314-1TB meets a 24-position floor but not 25. Its 24 positions split into 16 U.2 NVMe-only plus eight U.2 NVMe/SATA locations; 24 does not mean 24 SATA trays. See the original-model assessment and compare 24 bays with earlier models included to the 25-bay boundary.

QNAP TS-864eU: eight internal bays, then nine

With an eight-bay minimum, one built-in 2.5GbE port, and a required two-drive redundant arrangement, the QNAP TS-864eU 4GB and 8G-US profiles and the separate RP 4GB and 8G-US profiles meet the documented count: each comparison column lists eight native SATA bays. Read the 4GB selector assessment, 8G-US assessment, RP 4GB selector assessment, or RP 8G-US assessment. The 4GB entries are current manufacturer selector profiles, not confirmed -4G-US retail packages. Apply the same four conditions; for the bay threshold alone use the eight-bay floor.

Raising only the internal-bay minimum to nine removes all four TS-864eU profiles: the listed chassis has eight native SATA bays, and optional PCIe cards or external expansion do not turn it into a nine-bay chassis. The single-versus-dual power supply changes across standard and RP versions do not change bay count. A 12-bay QNAP TS-1264U-RP-8G-US is one different profile above nine. Keep the 2.5GbE and mirror requirements and raise the bay floor to nine, or use the nine-bay threshold alone.

UGREEN NASync DXP8800 Ultra: an eight-SATA-bay boundary

Both the NASync DXP8800 Ultra and DXP8800 Plus meet a floor of eight native SATA bays and fail at nine; on the Plus, two M.2 positions and a 128GB system SSD do not create additional SATA trays. Read the exact DXP8800 Ultra assessment and DXP8800 Plus assessment, or find all systems with the same eight-bay floor.

A nine-native-bay minimum excludes both eight-bay DXP8800 models; their separate M.2 NVMe positions and system SSDs are not additional SATA trays. Review the DXP8800 Ultra limit and the Plus limit, or apply the same finder question with a nine-bay floor. The 12-bay QNAP TS-h1290FX is a separate higher-bay example.

UGREEN NASync iDX6011 variants: six SATA bays, not eight data positions

The NASync iDX6011 32GB, iDX6011 64GB and iDX6011 Pro 64GB each list six native SATA bays; the two separate M.2 positions and 128GB system SSD do not increase that SATA-tray count. All three meet a six-bay floor and fail a seven-bay minimum. Their distinct 32GB, 64GB and Pro processor configurations remain separate product choices, and the U.S. versus Knowledge Center raw-capacity figures conflict, so neither advertised total is guaranteed usable space. Read the 32GB assessment, 64GB assessment or Pro assessment, or find every model with the same six-bay floor. Higher thresholds separate three new QNAP layouts: the TVS-AIh1688ATX U7 and U9 each have sixteen total positions (twelve 3.5-inch SATA bays plus four smaller SSD slots), so they meet 16 and fail 17; the TS-h1886XU-RP R2 D1622/32G has eighteen (twelve large SATA plus six small SSD positions), meeting 18 but failing 19; both TS-h3077AFU R5/32G and R7/64G have thirty 2.5-inch SATA SSD positions, meeting 30 but failing 31. The exact counts include different media classes; use the same 16, 17, 18, 19, 30 or 31-bay floor.

A seven-native-bay requirement excludes all three iDX6011 configurations because each has six SATA bays; two M.2 positions and the system SSD are not extra SATA trays. Check media type as well as the bay total before substituting a different NAS. Compare their 32GB, 64GB and Pro reviews, or see the separate 12-bay QNAP TS-h1290FX example. Apply the same seven-bay minimum to review the wider candidate set.

UGREEN NASync DXP480T Plus: four M.2 positions, not SATA trays

At a four-bay minimum, the DXP480T Plus supplies four M.2 NVMe data positions—not SATA trays—and its separate system SSD is not a fifth bay. Count the four internal SSD positions for this numeric threshold, but do not interpret the answer as four HDD slots; check each exact SSD against UGREEN's model-specific compatibility list. Read the DXP480T Plus assessment or find models with the same four-bay minimum.

A five-bay minimum excludes the DXP480T Plus because its four internal M.2 data positions do not become a fifth slot when the separate 128GB system disk is counted. A five-position option such as the Synology DS1525+ is a different layout, while buyers seeking SATA HDD trays should verify the media type as well as the bay total. Read the DXP480T Plus assessment or apply the same five-bay minimum.

AS6512RD: a twelve-bay boundary, not a capacity guarantee

The AS6512RD meets a 12-bay minimum with twelve native SATA trays; its four network ports and a possible two-drive mirror do not change the chassis bay count. ASUSTOR's 216-TB figure is raw arithmetic for twelve 18-TB drives, not usable space or proof that a particular drive/firmware tuple is compatible. Review the exact twelve-bay limits or use the same 12-bay floor.

A 13-native-bay minimum excludes the AS6512RD because its exact hardware table lists twelve internal SATA positions; a separate expansion unit does not add native bays. The listed 216-TB raw capacity is not a substitute for another internal tray. A different reviewed option is the 16-bay tower QNAP TS-1655-8G-US; its form factor and package need their own checks. Check the exact AS6512RD boundary or raise the same bay floor to thirteen.

A 12-bay floor plus a 2.5-Gbps individual-port minimum can fit the AS6512RD: its twelve SATA trays and separate 2.5GbE ports are both built in. The two 2.5GbE links are not one 5-Gbps connector, and its RAID 1 option is a separate drive-layout choice. Review its bay and network limits or apply both exact minimums.

TerraMaster F6-424 Max: six SATA bays and one 10-GbE link

The F6-424 Max is a six-native-SATA-bay NAS with two separate M.2 cache sockets and two individual 10-GbE RJ45 ports. A six-bay floor and a 10-Gbps single-port floor therefore fit its published hardware; one possible owner-created RAID 1 plan uses two buyer-selected compatible SATA drives and leaves four SATA bays open. A seven-bay floor excludes it because the chassis has only six native SATA positions, and a 10.5-Gbps single-port floor exceeds its 10-Gbps connector rating. The M.2 cache sockets do not count as SATA bays, and the two 10-GbE ports are not one 20-Gbps link. Its product page says 8 GB memory while the collection card says 16 GB, and capacity references conflict; check the exact version, compatible drives, unit and package rather than treating those unresolved fields as matching facts. Read the F6-424 Max documentation-based assessment, apply the same six-bay and one-port thresholds, screen the same six-bay, 10-GbE and mirror conditions, or screen those same thresholds with current-only scope. To test the limits, use seven bays or 10.5 Gbps.

TerraMaster F4-424 Max: four native bays, two cache sockets

With current-only scope and a four-native-bay floor, the F4-424 Max qualifies: its exact specification lists four SATA positions, while the two separate M.2 NVMe sockets are for caching and do not raise the tray count. Review its exact four-bay identity, drive and package limits or apply the same four-bay floor.

At a five-native-bay minimum, the F4-424 Max is excluded because the exact model has only four SATA positions; two M.2 cache sockets are not a fifth and sixth SATA bay. A distinct six-bay F6-424 Max has a different native-tray count. Check the F4-424 Max boundary or apply the same five-bay floor.

A four-bay minimum and a 10-Gbps floor for one built-in port intersect on the F4-424 Max: it lists four native SATA bays and two individual 10GbE RJ45 ports. Those are separate facts; a 10-GbE link rating is not a file-copy guarantee, and the two ports are not one 20-Gbps jack. Read the F4-424 Max path and package caveats or apply both exact numeric thresholds.

AS6808T: eight native bays, not nine

ASUSTOR's exact product-ID-88 table lists eight internal SATA positions on LOCKERSTOR 8 Gen3 (AS6808T), so it meets an eight-bay floor. Four separate M.2 2280 NVMe slots do not count as ninth through twelfth SATA bays. The 144-TB figure is raw arithmetic for eight 18-TB drives, not usable or included capacity. Review the exact AS6808T profile or find models with the same eight-bay minimum.

At a nine-native-bay minimum, AS6808T falls short: its exact specification lists eight SATA trays, while its four separate M.2 positions and optional expansion unit do not add native chassis bays. The reviewed nine-bay QNAP TS-h973AX-8G-US is one higher-count comparison. Apply the same nine-bay floor.

AS6702T v2: two SATA trays, with M.2 separate

The exact AS6702T v2 hardware specification lists two native SATA drive positions, so a two-bay floor counts the chassis's internal SATA positions rather than usable storage capacity, included disks or four separate M.2 connectors. Its optional expansion-unit total does not raise the base model's native-bay count; the compatible-drive list and actual disk choice still need checking before use.

At a two-native-bay minimum, AS6702T v2 meets the threshold with exactly two SATA trays; the four M.2 2280 NVMe positions are a separate storage layer, not extra SATA bays. Review the two-bay and M.2 distinction or apply the same two-bay floor.

Raising the native-bay floor to three excludes AS6702T v2 because it has two SATA trays, not three; its M.2 slots are a different connector type. A four-SATA-bay comparison is the ASUSTOR AS6704T, whose distinct profile should still be checked against the intended setup. Check the exact chassis count or apply the same three-bay floor.

ASUSTOR DRIVESTOR 2 Lite: two native drive bays

The ASUSTOR DRIVESTOR 2 Lite (AS1102TL) has two native 3.5-inch SATA HDD bays, so it meets the two-bay minimum; its optional expansion unit does not add internal bays to this chassis. The package page lists no data drives. Read the exact-model review or apply the same two-bay floor.

At a three-native-bay minimum, the AS1102TL is excluded: its hardware table lists only two internal bays. Compare the separate three-bay QNAP TS-364-8G profile if three positions are essential. Check the ASUSTOR bay limit or raise the same finder floor to three bays.

QBoat-300-US: three internal M.2 positions, not SATA trays

The QBoat-300-US meets a three-position internal-drive minimum with its three built-in M.2 NVMe slots, but those positions are not SATA trays. QNAP lists M.2 2280/22110 SSDs and two Gen 3 x1 lanes plus one Gen 2 x1 lane; check exact SSD compatibility before ordering. Review the storage and compatibility limits or apply the same three-position minimum.

A four-internal-position minimum excludes the QBoat-300-US: its three M.2 NVMe positions are its only documented internal storage positions, and they are not SATA trays. The four-bay TS-433eU-US is a different chassis with native SATA bays. Check the QBoat-300's exact bay count or apply the same four-position minimum.

TS-433eU-US: a four-position rack example

QNAP lists four native 3.5-inch SATA positions on the TS-433eU-US; its exact selector names 3.5-inch SATA hard drives and 2.5-inch SATA SSDs, not 2.5-inch hard drives. A four-bay floor includes this profile, while a five-bay floor does not. A compatibility category is not approval for a specific disk model or firmware. Read the drive and package assessment or show the same four-native-bay minimum.

A five-native-bay minimum excludes the TS-433eU-US because its documented chassis has exactly four internal positions. The short-depth TR-004U expansion accessory is a separate product and is not a fifth native bay. Compare the separately reviewed six-bay TS-664-8G. Check the TS-433eU-US bay limit or apply the same five-bay minimum.

A four-bay minimum combined with a 2.5-Gbps single-port floor includes the TS-433eU-US: it has four native positions and each built-in Ethernet port is rated at 2.5GbE. The separate rails, drive compatibility and complete network path still need checking. Read the exact-model review or use both same-condition finder requirements.

Raising that setup to five native bays excludes the TS-433eU-US even though its individual port meets 2.5GbE; the port does not change its four-position chassis. The six-bay TS-664-8G is a separate profile to compare. Review the four-bay limit or apply the same five-bay and network conditions.

TS-464-4G Legacy: four native positions, not six

At a four-native-bay floor, the earlier TS-464-4G is included because QNAP documents four internal SATA trays. Its two M.2 sockets are separate NVMe positions, not a fifth or sixth SATA tray. Review the Legacy configuration or apply the same earlier-model and four-bay answers.

At a five-native-bay floor, the TS-464-4G is excluded: its documented count remains four SATA trays and the M.2 sockets do not add native bays. The six-bay TS-664-8G is a distinct higher-count comparison. Check this exact bay limit or keep earlier-model scope and use the same five-bay floor.

UGREEN DXP2800: two native bays, not four

The DXP2800 and DXP2800 + UPS3000 each have two native SATA bays: both meet a two-bay minimum, but both fail a three-bay floor; their two M.2 positions do not add SATA bays. The ASUSTOR DRIVESTOR 2 Gen2 (AS1202T) also has exactly two native 3.5-inch SATA bays: it meets a two-bay floor and is excluded when the minimum rises to three. Check the base NAS, check the bundle's package limits, check the AS1202T's two native bays, compare a documented three-bay model, use the same two-bay floor, or raise it to three bays.

AS1104T: four native positions, not five

For AS1104T, four native 3.5-inch SATA positions meet a four-bay floor and fail a five-bay minimum; its separately listed expansion capacity does not add native chassis positions. The newer AS1204T also has four native bays, but its own evidence is distinct. Review AS1104T's exact bay and expansion limits, compare the newer AS1204T, compare a reviewed six-bay alternative, use the same four-bay floor, or raise it to five bays.

AS6810T: ten native SATA bays, four separate M.2 positions

ASUSTOR lists ten native SATA bays on the AS6810T, so it meets a 10-bay floor but fails an 11-bay minimum; four separate M.2 slots do not raise its tray count. The listed 180-TB figure is raw arithmetic, and any expansion shelf adds external rather than native positions. Review the exact ten-bay chassis and capacity limits, use the same ten-bay floor, or raise it to eleven bays.

An 11-bay floor excludes the AS6810T: it has ten native SATA trays, and its four M.2 slots are not four extra trays. The separately reviewed 12-bay QNAP TS-1232PXU-RP-4G-US is one higher-count option to compare, with rack fit and SFP+ network checks. Check the AS6810T's ten-bay ceiling or show the same eleven-bay minimum.

AS3302T v2: two native bays, not three

The AS3302T v2 has two native SATA positions: it meets a two-bay floor and fails a three-bay minimum; its advertised fourteen total positions require an external expansion unit. With the current-only scope held constant, the AS3302T v2 meets a two-native-bay floor. Review its exact two-bay limit, or apply the same current-only two-bay floor.

Raising the native-bay minimum to three excludes this two-bay model; the reviewed three-bay QNAP TS-364-8G is a separate fit to compare. Review the three-bay alternative, or use the same current-only three-bay floor.

AS3304T v2: a four-native-bay boundary

The AS3304T v2 specification lists four native SATA drive positions; an expansion unit does not change its four-bay chassis count. The AS6804T specification also lists four native SATA positions; its four separate M.2 slots do not raise that bay floor, so a minimum of four includes it and a minimum of five excludes it. Review the exact AS6804T four-bay profile, apply a four-bay minimum, or raise the same bay threshold to five.

With a four-bay minimum, the exact AS3304T v2 reaches the threshold using its four native positions. Review its SATA-media and capacity limitations or apply the same four-bay floor.

A five-bay minimum excludes the AS3304T v2 because its chassis has four native positions; expansion hardware is separate. The QNAP TS-664-8G assessment is one reviewed higher-bay example to compare. Check the four-bay limit or apply the same five-bay floor.

AS5402T: two SATA bays, separate M.2 positions

At a two-native-bay minimum, both AS5402T and the original-generation LOCKERSTOR 2 Gen2 (AS6702T) meet the threshold with two SATA positions each; the AS6702T's four separate M.2 connectors do not increase that count. Review the AS5402T distinction, review the exact AS6702T profile, or use the same two-bay minimum.

At a three-native-bay minimum, both AS5402T and AS6702T are excluded because each chassis has two SATA bays; the AS6702T's four M.2 positions are a different connector type, not extra SATA trays. A reviewed four-bay alternative is the ASUSTOR NIMBUSTOR 4 (AS5304T), whose four SATA positions and two-drive RAID 1 plan use a different chassis; its official processor and expansion statements conflict, so those capabilities remain unresolved here. Check AS5402T, check AS6702T, or apply the same three-bay minimum.

AS5404T: four native SATA positions

At a four-native-bay minimum, the exact AS5404T qualifies with four SATA positions; its four M.2 slots are separate and do not raise that count. Review the AS5404T bay and M.2 distinction or apply the same four-bay floor.

A five-native-bay minimum excludes AS5404T: its exact chassis has four SATA positions, not five, regardless of its separate four M.2 slots. A reviewed higher-bay option is the six-bay QNAP TS-664-8G. Check the AS5404T’s four-bay limit or apply the same five-bay floor.

AS6704T: four native SATA positions, not eight

The ASUSTOR LOCKERSTOR 4 Gen2 (AS6704T) meets a four-native-bay minimum with four SATA positions; its four separate M.2 NVMe slots are not extra SATA bays. The current-reference AS6804T Gen3 also has four native SATA positions; its own four M.2 slots are separate, and the model adds dual built-in 10-GbE links rather than extra SATA trays. The AS6504RS is another four-bay boundary, but in a 1U rack chassis with one PSU and two built-in 2.5GbE ports; its four SATA trays remain its native count. The separate AS6504RD has the same four native SATA bays in a 1U chassis, but two 250-W power supplies and two package AC cords distinguish it from the single-supply RS. Review the exact AS6704T bay and M.2 distinction, compare the AS6804T Gen3, check the AS6504RS rack configuration, compare the AS6504RD dual-supply version, or apply the same four-bay floor.

A five-native-bay minimum excludes the AS6704T because its chassis has four internal SATA positions, not five; M.2 connectors do not add bays. The AS6804T Gen3 is also four-bay despite its four separate M.2 positions, and the rackmount AS6504RS and AS6504RD each have four native SATA bays, so neither rack unit meets a five-native-bay floor; the RD's second PSU does not add a tray. The six-bay QNAP TS-664-8G is a reviewed larger comparison. Check the AS6704T's four-bay ceiling, check the AS6804T's four-bay ceiling, check the AS6504RS's four-bay ceiling, check the AS6504RD's four-bay ceiling, or apply the same five-bay floor.

At a four-native-bay floor, the AS6704T can also meet a 2.5-Gbps one-port minimum and required two-drive redundancy together: one owner-created RAID 1 pair uses two of the four SATA bays and leaves two positions unused. Its optional 10GbE card is not built in, and the mirror needs separately selected compatible drives. The AS6504RS can meet the same four-bay/2.5GbE/mirror screen with a buyer-created two-drive RAID 1 plan, leaving two bays open; unlike the 4RD sibling, it has one PSU, and optional 10GbE does not change its built-in-port rating. The separate AS6504RD also matches these thresholds in one two-drive RAID 1 arrangement, leaves two native trays unused and has two power supplies; its package still has no data drives or configured mirror. Read the four-bay mirror and expansion limits, compare the AS6504RS's rack, single-PSU and mirror limits, read the AS6504RD dual-PSU and RAID distinction, or apply the same four-bay, 2.5-Gbps and mirror requirements.

AS6706T: count six SATA bays, not its separate M.2 positions

At a six-native-bay floor, the AS6706T qualifies with six internal 2.5-/3.5-inch SATA positions; its four M.2 NVMe connectors are a separate storage layer, not bays seven through ten. The distinct AS6706T v2, product ID 96, also meets the six-bay boundary with six native SATA positions; its four M.2 slots do not add bays. Review the original AS6706T bay evidence, compare the exact AS6706T v2, or apply the same six-bay floor.

A seven-native-bay floor excludes the AS6706T: its chassis has six SATA trays, and four separate M.2 positions do not supply a seventh SATA bay. The specification's expansion-unit total does not change the base-chassis count. The same seven-bay floor also excludes the distinct AS6706T v2: its product-ID-96 specification lists six native SATA positions, and its M.2 slots do not make a seventh tray. A reviewed higher-bay comparison is the eight-bay QNAP TVS-h877AX-R5-16G-US. Check the original six-bay boundary, check the v2 bay limit, or apply the same seven-bay floor.

A six-bay floor and a 2.5-Gbps minimum for one built-in Ethernet port intersect on the AS6706T: it has six native SATA trays and two distinct 2.5-Gbps ports. Those ports are not one 5-Gbps interface, and its optional 10GbE card is a separate PCIe path that requires removal of the M.2 daughterboard. The reviewed QNAP TS-673A-8G-US is another six-bay, built-in-2.5GbE comparison. Read the AS6706T bay/network and M.2 tradeoff or apply both same-condition floors.

AS6704T v2: count four native SATA positions

ASUSTOR product ID 95 lists four native SATA drive bays on the AS6704T v2, so it meets a four-bay floor; its four separate M.2 NVMe sockets are not bays five through eight. Review the exact four-bay and M.2 distinction or apply the same four-bay floor.

A five-native-bay floor excludes AS6704T v2: the exact hardware specification lists four SATA positions, and M.2 NVMe sockets are a separate storage interface. The reviewed six-bay QNAP TS-664-8G is one larger alternative to compare. Check the exact AS6704T v2 bay limit or apply the same five-bay floor.

AS6508T: eight native SATA bays, separate M.2 volume positions

ASUSTOR lists eight native SATA trays on the AS6508T; its two M.2 SSD positions and a separate expansion unit do not raise the native-bay count, so it passes an eight-bay floor but fails a nine-bay floor. Review the exact eight-bay and M.2 distinction or apply the same eight-bay floor.

A nine-native-bay minimum excludes the AS6508T: the exact specification lists eight SATA trays, and its two M.2 positions and external expansion unit are not native SATA bays. The separate ten-bay LOCKERSTOR 10 Gen3 (AS6810T) is one reviewed higher-count comparison. Check the AS6508T's exact native count or apply the same nine-bay floor.

AS6510T: ten native SATA trays, separate M.2 positions

At a 10-native-bay minimum, the AS6510T qualifies: ASUSTOR specifies ten SATA trays and counts its two M.2 positions separately. Review the AS6510T bay and capacity limits or apply the same ten-bay floor.

At an 11-native-bay minimum, the AS6510T is excluded because its chassis has ten SATA trays; neither M.2 position makes an eleventh native bay. Check the exact ten-bay profile or compare the 12-bay QAI-h1290FX assessment; apply the same eleven-bay floor.

FLASHSTOR 6: six internal M.2 positions, zero SATA trays

For the finder's physical internal-position count, the FS6706T has six M.2 2280 NVMe slots and meets a six-position floor; all six positions are M.2, not SATA trays. Review its all-M.2 layout and limits or apply the same six-position floor.

A seven-position floor excludes the FS6706T because its exact model has six internal M.2 NVMe slots; the U.S. comparison lists no SATA bays, so there is no seventh tray. The reviewed eight-bay QNAP TVS-h877AX-R5-16G-US is one higher-count comparison. Check its exact six-position boundary or apply the same seven-position floor.

FLASHSTOR 12 Pro: twelve M.2 positions, not twelve SATA trays

The FS6712X meets a twelve-position minimum with twelve internal M.2 2280 NVMe slots, but none are 2.5- or 3.5-inch SATA trays. If you mean twelve SATA trays, the separate ASUSTOR LOCKERSTOR 12RD (AS6512RD) profile has twelve native SATA positions and a different drive layout. Review the exact all-M.2 layout or apply the same twelve-position floor.

A thirteen-position floor excludes the FS6712X because its exact chassis has twelve M.2 slots and no SATA bays; generic HDD capacity arithmetic does not create a thirteenth position. The sixteen-bay Synology RS2825RP+ is one higher-count configuration to compare. Check the FS6712X count and media limit or apply the same thirteen-position floor.

With current models only, a twelve-position floor, a 10-Gbps individual-port floor and required two-drive redundancy can coexist on the FS6712X: two buyer-selected compatible NVMe SSDs could form an owner-created mirror, leaving ten slots open, while one 10-GbE port meets the link-rating floor. Review the SSD, RAID and network caveats or apply those same four choices.

FLASHSTOR 6 Gen2: six positions, all M.2 NVMe

The FS6806X reaches six physical internal positions with six M.2 2280 NVMe slots, but none is a SATA tray; count this only if NVMe is your intended media. The generic six-HDD capacity arithmetic is not an SSD limit. Review the model-specific media and capacity caveats or apply the same six-position floor.

A seven-position minimum excludes FS6806X: it has six internal M.2 NVMe slots, no listed SATA bays and no seventh native position. Do not count generic expansion-unit wording as a built-in bay. The eight-position ASUSTOR AS6808T is a higher-count comparison with its own distinct SATA trays. Check the exact FS6806X six-position limit or apply the same seven-position floor.

FLASHSTOR 12 Pro Gen2: twelve internal M.2 positions

The FS6812X meets a twelve-position floor with twelve M.2 2280 NVMe slots, but it is not a twelve-tray SATA chassis. Its media and interface profile differs from the earlier FS6712X, even though both have twelve positions. Review the exact Gen2 M.2 and capacity caveats or apply the same twelve-position floor.

A thirteen-position minimum excludes the FS6812X: the exact model has twelve native M.2 2280 NVMe positions and no ordinary SATA bays. Generic HDD arithmetic or external expansion language does not establish a thirteenth native position. The sixteen-bay Synology RS2825RP+ is one higher-count profile to compare. Check the exact FS6812X bay boundary or raise the same minimum to thirteen.

LOCKERSTOR 12R Pro: twelve native SATA trays

The exact AS7112RDX has twelve native SATA bays; its two M.2 cache sockets do not raise the count. Because ASUSTOR marks this model Discontinued, it appears only when “Include earlier models” is selected. With that choice, a twelve-bay floor includes it; raising the floor to thirteen excludes it on native bay count, even before media compatibility is considered. Review the exact model and its SATA-versus-M.2 distinction, apply the same include-earlier twelve-bay floor, or test the thirteen-bay boundary.

LOCKERSTOR 16R Pro: sixteen trays, not an expansion total

ASUSTOR documents sixteen native SATA trays in the AS7116RDX's 3U chassis. Its two separate M.2 sockets do not create a seventeenth SATA bay, and neither does an optional expansion figure: official references disagree between 28 and 40 total positions with expansion, so this guide makes no expansion-count promise. The model meets a sixteen-native-bay floor and fails a seventeen-bay floor. The latest status result says Discontinued, while an older capture said Generally Available; “Include earlier models” is needed under the latest evidence, and the conflict deserves a fresh check before purchase. Review the exact chassis and source limits, apply the same include-earlier, sixteen-bay answers, or test a seventeen-bay minimum.

LOCKERSTOR RDX Gen2: three different native SATA floors

The AS7212RDX has twelve native SATA trays in its 2U chassis. Its separate single M.2 NVMe position and optional expansion figures do not change the twelve-bay native count; the manufacturer selector and datasheet disagree about the expansion total, which is not used here. It meets a 12-bay floor and fails a 13-bay floor. Review its exact 12R Gen2 configuration, apply the same numeric 12-bay floor, test the numeric 13-bay boundary, apply the same current-only 12-bay floor, or test the current-only 13-bay boundary.

The AS7216RDX has sixteen native SATA trays in a 3U chassis. Neither its separate M.2 NVMe position nor the conflicting 32-versus-44 expansion totals add a native bay. It meets a 16-bay floor and fails a 17-bay floor. Review the exact 16R Gen2 limits, apply the same numeric 16-bay floor, test the numeric 17-bay boundary, apply the same current-only 16-bay floor, or test the current-only 17-bay boundary.

The AS7224RDX has twenty-four native SATA positions in its 172-mm-high chassis. Its separate M.2 NVMe position does not make a twenty-fifth SATA bay; the official selector and datasheet list different expansion totals, so neither total is treated as a native count. It meets a 24-bay floor and fails a 25-bay floor. Review the exact 24R Gen2 chassis and power references, apply the same numeric 24-bay floor, test the numeric 25-bay boundary, apply the same current-only 24-bay floor, or test the current-only 25-bay boundary.

F8 SSD Plus: eight native NVMe positions, not SATA trays

At an eight-position internal-storage minimum, the F8 SSD Plus meets the count using eight explicitly listed M.2 2280 NVMe slots; it has no listed SATA trays. Its separate “Disk Slot Number: N/A” entry is a label ambiguity, so the positive result rests on the explicit M.2 slot row and does not relabel the chassis as eight SATA bays. Compatible drive models remain a separate exact-module check. Read the F8 SSD Plus media and capacity assessment or apply the same numeric eight-position floor.

At a nine-position minimum, the F8 SSD Plus is excluded: TerraMaster's exact page lists eight M.2 NVMe positions, and no SATA tray, cache socket or expansion shelf is added to this native count. A separately reviewed QNAP TS-h973AX-8G-US offers a nine-bay alternative for a different storage plan. Check the eight-position profile or apply the same numeric nine-position floor.

F8 SSD: eight internal NVMe positions, not SATA trays

At an eight-position internal-bay minimum, the F8 SSD meets the documented count: its exact specification lists eight internal M.2 2280 NVMe positions. These are not SATA trays, and an eight-bay label does not prove eight compatible modules can be populated together. Read the F8 SSD count and compatibility review or apply the same eight-position floor.

A nine-position floor excludes the F8 SSD because its manufacturer specification lists eight M.2 NVMe positions and no ninth native bay. The QNAP TS-h973AX-8G-US is a separately reviewed nine-bay alternative with a different SATA/SSD layout. Check the F8 SSD's exact eight-position ceiling or raise the same numeric floor to nine positions.

F6-425 Pro: six native SATA bays, not nine

At a six-bay minimum, the F6-425 Pro meets the documented native-bay field: TerraMaster lists six 3.5/2.5-inch SATA positions. Its three separate M.2 2280 NVMe sockets do not turn this into a nine-bay SATA chassis or a nine-bay finder result. A possible two-drive TRAID arrangement uses two of the six SATA positions and leaves four open; choose each exact drive from the compatibility evidence, and do not treat a nominal raw capacity claim as usable space. Review the six-bay and capacity conflict or use the same six-bay floor with other answers open.

A seven-bay floor excludes the F6-425 Pro: the exact product specification provides six native SATA positions, and its three separate M.2 sockets do not increase this question's six-bay field. The QAI-h1290FX is one result with at least seven internal positions, but its all-flash media and chassis role differ. Check the F6-425 Pro's six-bay limit or use the same seven-bay floor with other answers open.

F4-425 Pro N305 and N350: four SATA bays, three separate M.2 positions

For a four-bay floor, both the F4-425 Pro N305 and N350 profiles qualify on four native SATA positions; their three separate M.2 NVMe sockets are not counted as additional bays. Read the N305 bay and memory assessment and the separate N350 assessment, or apply the same four-bay minimum with other choices open.

A five-bay floor excludes both F4-425 Pro configurations because TerraMaster lists four SATA positions, not five. The additional M.2 SSD sockets are separate and cannot satisfy a fifth native bay requirement; a six-bay F6-424 Max is a different chassis. Apply the same five-bay floor with other answers open.

F4-424 Pro 16 GB and 32 GB: four SATA bays

Both F4-424 Pro memory options have four native SATA bays; the two separate M.2 NVMe cache sockets do not count as bays. Read the 16-GB assessment and the 32-GB assessment, or use the same four-bay minimum with other answers open.

A five-bay minimum excludes both F4-424 Pro memory profiles: each has four native SATA positions, and neither M.2 cache socket adds a tray. The six-bay F6-425 Pro is a different current-reference chassis to compare. Apply the same five-bay floor with other answers open.

F2-425 Plus N150 and N95: two HDD bays plus three separate M.2 slots

The N150 and N95 F2-425 Plus options meet a two-bay minimum with two native HDD positions; their three separate M.2 slots are not extra SATA bays. Read the N150 bay and memory evidence and the distinct N95 assessment, or apply the same two-bay minimum with other answers open.

A three-bay floor excludes both F2-425 Plus CPU options because each has two native HDD positions; the three M.2 sockets do not satisfy a third native bay. The four-SATA-position F4-425 Plus N150 and N95 are separate larger-bay alternatives. Raise the same minimum to three bays.

F4 SSD: four internal NVMe positions, no SATA trays

At a four-position minimum, the F4 SSD meets the documented floor because TerraMaster lists four internal M.2 2280 NVMe positions; none is a SATA tray. Read the F4 SSD bay and raw-capacity limits, or apply the same four-position minimum with other answers open.

A five-position minimum excludes the F4 SSD: the exact specification lists four M.2 NVMe positions and no fifth internal position. A separate six-bay option is the F6-424, with SATA trays and M.2 cache sockets counted separately. Apply the same five-position floor with other answers open.

F4-424: four native SATA bays; two M.2 sockets stay separate

At a four-native-bay minimum, the TerraMaster F4-424 qualifies because the exact model lists four SATA drive positions; its two separate M.2 NVMe cache sockets do not add two more bays. Read the standard F4-424 bay and capacity assessment or apply the same four-bay minimum with other answers open.

A five-native-bay minimum excludes the TerraMaster F4-424: its two separate M.2 NVMe cache sockets do not add to its four SATA positions. A different six-bay SATA chassis is the F6-424; compare its own drive-support and setup facts rather than treating cache connectors as trays. Apply the same five-bay floor with other answers open.

F2-424: two SATA bays, not four positions

The F2-424 meets a two-native-bay floor with its two SATA drive positions. Its two separate M.2 NVMe cache sockets do not increase that SATA-bay count, so a three-native-bay minimum excludes it. The four-SATA-position F4-424 is a different model, not an F2-424 variant. Review the F2-424's bay and capacity limits; apply the same two-bay floor or test the three-bay boundary.

F2-425: two native SATA positions, no M.2 bay substitute

At a two-native-bay minimum, the standard F2-425 qualifies with its two SATA drive positions; its model comparison lists no M.2 SSD slot. Review the F2-425's exact storage layout or apply the same two-bay floor.

A three-native-bay floor excludes the F2-425: the exact model lists two SATA trays and no M.2 SSD positions, so it cannot meet a third-bay requirement. The four-SATA-position F4-425 is a separate two-bays-more comparison, not a configuration of the F2-425. Check the two-bay limit or apply the same three-bay floor.

F4-212: four native SATA positions set the bay threshold

At a four-native-bay minimum, the exact 2-GB F4-212 page configuration qualifies: its model specification lists four SATA positions and no M.2 position to count separately. The 88-TB example is raw capacity, not a usable-volume promise. Read the exact bay and capacity assessment or apply the same four-bay floor.

A five-native-bay minimum excludes this F4-212 because its exact specification lists four SATA positions; neither USB ports nor an external shelf would create a fifth internal bay. Check the four-bay limit or apply the same five-bay floor.

UGREEN DXP4800 Plus: four native SATA bays

At a four-bay minimum, the DXP4800 Plus qualifies with four native SATA trays; its two separate M.2 NVMe positions do not raise the tray count. Review the exact model or find systems with the same four-bay floor.

A five-bay minimum excludes this model because the DXP4800 Plus has four native SATA bays; neither M.2 slot counts as an additional SATA bay. The six-bay TerraMaster F6-424 Max is a different profile to compare. Check the documented bay distinction or find systems with the same five-bay floor.

UGREEN DXP4800 Pro: four SATA bays, not six

At a four-bay minimum, the standalone DXP4800 Pro qualifies with four native SATA trays; its two M.2 sockets are separate positions, and the + UPS3000 package has the same NAS bay count. Review the standalone Pro or the separately assessed UPS package, then apply the same four-bay floor.

Raising the floor to five native SATA bays excludes both DXP4800 Pro selections: each NAS chassis has four SATA trays, while its two M.2 positions are separate SSD slots, not extra SATA bays. A different five-bay option such as the Synology DS1525+ has a different internal-bay count. Check the Pro’s bay boundary or apply the same five-bay floor.

UGREEN NASync DXP2800 GT: two SATA bays

At a two-bay minimum, the standalone DXP2800 GT qualifies with two native SATA positions; the two M.2 SSD slots are listed separately and do not count as extra SATA trays. Review its exact storage layout or apply the same two-bay floor.

Raising only the native-bay minimum to three excludes the DXP2800 GT because its detailed U.S. specification lists two SATA bays. The separate M.2 slots do not satisfy a third SATA-bay requirement; the six-position QNAP TS-632X-4G-US is one different higher-count model. Check the GT’s two-bay limit or apply the same three-bay floor.

UGREEN NASync DXP4800 GT: four native SATA bays

At a four-native-bay minimum, the standalone DXP4800 GT and its separately selected UPS package meet the threshold with four SATA trays; both also have two separate M.2 sockets, which do not increase the SATA-bay count. UGREEN says compatible U.2 drives can occupy front bays 1 and 2 instead of SATA drives, not add positions. Review the standalone GT or GT UPS package, or find systems with the same four-bay floor.

A five-native-bay minimum excludes both DXP4800 GT selections: each NAS has four SATA trays, and neither M.2 socket adds a fifth SATA bay. U.2 use in bays 1 and 2 is an alternate media path, not extra capacity in the bay count. The five-bay Synology DS1525+ is a separate model to compare. Check the standalone GT or UPS configuration, or apply the same five-bay floor.

The NASync DXP6800 Ultra meets a six-native-bay minimum with its six SATA trays; a seven-bay floor excludes it. Its two M.2 SSD positions and 128GB system SSD are separate and do not create a seventh or eighth SATA bay. Read the exact DXP6800 Ultra review, or find systems with the same six-bay floor. The eight-SATA-bay DXP8800 Ultra separately meets an eight-bay floor and is excluded at nine; its M.2 positions and system SSD do not add SATA trays. Read the DXP8800 Ultra review.

UGREEN DH4300 Plus: four physical bays meet four, not five

At a four-native-bay floor, the DH4300 Plus qualifies when the same current-only, 2.5GbE and mirror requirements apply; a possible two-drive RAID 1 plan uses two of its four SATA bays. Read the DH4300 Plus assessment or apply these same four requirements.

Raising only the native-bay floor to five excludes the four-bay DH4300 Plus; its eMMC system disk and USB ports are not extra drive trays. A different six-bay QNAP TS-632X-4G-US remains a higher-count model to compare, with its own SFP+ network-cabling checks. Apply the same requirements with only the bay floor raised to five.

UGREEN DH4300 Plus against the bay threshold by itself

At a four-native-bay floor, the UGREEN DH4300 Plus meets it with four SATA drive bays; this answer applies the bay threshold alone. See the standalone DH4300 Plus review or apply the same four-bay floor.

At a five-native-bay floor, the four-bay DH4300 Plus is excluded; the separate eMMC system storage is not another drive bay. The six-bay QNAP TS-632X-4G-US is one different model that remains above this bay floor. Apply the same five-bay floor.