NAS Drive Compatibility

Western Digital WD RED Plus 4 TB

NAS HDD

Part number WD40EFPX · WD RED Plus series · 3.5" SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.

WD REDPlusNAS HARD DRIVE3.5" SATA HDDWESTERN DIGITAL

Part of the Western Digital WD RED Plus series →

Check WD40EFPX price on Amazon  partner link

64
Compatible NAS models
0 Syn · 0 QNAP · 0 Asus · 48 TM
By vendor
4 TB
Listed capacity
Western Digital
Manufacturer
NAS
Product line (manufacturer rating)
5400
Spindle speed (RPM)
CMR
Recording
256 MB
Cache
180 TB
Rated workload / year

Specifications are the manufacturer's published ratings for this product series; verify the exact part number before purchase.

Strong pick as a cold copy

Rated CMR (conventional magnetic recording) — the right recording type for a large cold copy. CMR keeps a full-library backup pass fast even at 16–24 TB, which is the whole point of the offline slot in a 3-2-1 plan: rotate two drives monthly, keep one powered off, and the backup tooling (Veeam, Duplicati, Hyper Backup, HBS 3) does the scheduling. Full rule and vendor tool table: 3-2-1 for NAS.

Compatibility verdict

It appears on the official compatibility lists of 64 machines and series — 48 TerraMaster, 16 UGREEN. This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. Its series rating is on file as CMR (conventional) — what RAID rebuilds and full-library copies want.

Compatible NAS models

TerraMaster D16 Thunderbolt 3 See its full HCL → TerraMaster D2-310 See its full HCL → TerraMaster D2-320 See its full HCL → TerraMaster D2 Thunderbolt 3 See its full HCL → TerraMaster D4-300 See its full HCL → TerraMaster D4-320 See its full HCL → TerraMaster D4-320U See its full HCL → TerraMaster D5-300 See its full HCL → TerraMaster D5-300C See its full HCL → TerraMaster D5-310 See its full HCL → TerraMaster D5 Hybrid See its full HCL → TerraMaster D5 Thunderbolt 3 See its full HCL → TerraMaster D6-320 See its full HCL → TerraMaster D8 Hybrid See its full HCL → TerraMaster D8 Thunderbolt 3 See its full HCL → TerraMaster D9-320 See its full HCL → TerraMaster F2-210 See its full HCL → TerraMaster F2-212 See its full HCL → TerraMaster F2-423 See its full HCL → TerraMaster F2-424 See its full HCL → TerraMaster F2-425 See its full HCL → TerraMaster F2-425 Plus See its full HCL → TerraMaster F4-210 See its full HCL → TerraMaster F4-212 See its full HCL → TerraMaster F4-423 See its full HCL → TerraMaster F4-424 See its full HCL → TerraMaster F4-424 Max See its full HCL → TerraMaster F4-424 Pro See its full HCL → TerraMaster F4-425 See its full HCL → TerraMaster F4-425 Plus See its full HCL → TerraMaster F4-425 Pro See its full HCL → TerraMaster F6-424 See its full HCL → TerraMaster F6-424 Max See its full HCL → TerraMaster F6-425 Pro See its full HCL → TerraMaster T12-450 See its full HCL → TerraMaster T12-500 Pro See its full HCL → TerraMaster T6-423 See its full HCL → TerraMaster T9-423 See its full HCL → TerraMaster T9-450 See its full HCL → TerraMaster T9-500 Pro See its full HCL → TerraMaster U12 See its full HCL → TerraMaster U12-500 Plus See its full HCL → TerraMaster U16 See its full HCL → TerraMaster U24 See its full HCL → TerraMaster U4 See its full HCL → TerraMaster U4-500 See its full HCL → TerraMaster U8 See its full HCL → TerraMaster U8-500 Plus See its full HCL → UGREEN dh2300 See its full HCL → UGREEN dh4300-plus See its full HCL → UGREEN dxp2800-gt See its full HCL → UGREEN dxp4800 See its full HCL → UGREEN dxp4800-gt See its full HCL → UGREEN dxp4800-plus See its full HCL → UGREEN dxp4800-pro See its full HCL → UGREEN dxp6800-plus See its full HCL → UGREEN dxp6800-pro See its full HCL → UGREEN dxp6800-ultra See its full HCL → UGREEN dxp8800-plus See its full HCL → UGREEN dxp8800-ultra See its full HCL → UGREEN ha100 See its full HCL → UGREEN ha100-pro See its full HCL → UGREEN idx6011 See its full HCL → UGREEN idx6011-pro See its full HCL →

Same-capacity alternatives

Other drives listed at 4 TB capacity, ranked by how many machines list them:

Toshiba MG04ACA400E 451 machines · MG04ACA**** Western Digital WD4003FFBX 390 machines · Red Pro Seagate ST4000NE0015 379 machines · Enterprise NAS HDD Toshiba MG04ACA400N 353 machines · MG04ACA**** Western Digital WD40PURZ 352 machines · Purple Seagate ST4000NM002A 346 machines · Exos 7E8 Seagate ST4000NE0025 344 machines · IronWolf Pro Western Digital HUS726T4TALA6L4 333 machines · Ultrastar 7K6

Quick answers

Is the WD40EFPX officially compatible with my NAS?

It appears on the official compatibility lists of 64 machines and series — 48 TerraMaster, 16 UGREEN. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the WD40EFPX CMR or SMR?

As a Western Digital WD RED Plus drive, it is rated CMR. CMR (conventional magnetic recording) is what a RAID array wants: SMR drives slow rebuilds dramatically. See the <a href="/faq/cmr-vs-smr-nas-drives/">CMR vs SMR guide</a> for the full series table.

Is the WD40EFPX a good NAS drive?

This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. Its series rating is on file as CMR (conventional) — what RAID rebuilds and full-library copies want.

Can I use the WD40EFPX for a 3-2-1 cold backup copy?

Rated CMR (conventional magnetic recording) — the right recording type for a large cold copy. CMR keeps a full-library backup pass fast even at 16–24 TB, which is the whole point of the offline slot in a 3-2-1 plan: rotate two drives monthly, keep one powered off, and the backup tooling (Veeam, Duplicati, Hyper Backup, HBS 3) does the scheduling. Full rule and vendor tool table: 3-2-1 for NAS.

What are alternatives to the WD40EFPX?

At the same capacity, the most widely listed alternatives are Toshiba MG04ACA400E (451 machines), Western Digital WD4003FFBX (390 machines), Seagate ST4000NE0015 (379 machines). The full ranked list is below.