NAS Drive Compatibility

Western Digital Red Plus 4TB

NAS HDD

Part number WD40EFZZ · Red Plus series · SATA 6Gb/s (SATA III). If your machine is listed below, this drive is officially supported — not a forum workaround.

Red PlusNAS HARD DRIVE3.5" SATA HDDWESTERN DIGITAL

Part of the Western Digital Red Plus series →

Check WD40EFZZ price on Amazon  partner link

74
Compatible NAS models
0 Syn · 62 QNAP · 0 Asus · 0 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 74 machines and series — 62 QNAP, 12 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

QNAP HS-264 See its full HCL → QNAP TL-D400S See its full HCL → QNAP TL-D800C See its full HCL → QNAP TL-D800S See its full HCL → QNAP TL-R400S See its full HCL → QNAP TR-002 See its full HCL → QNAP TR-004 See its full HCL → QNAP TR-004U See its full HCL → QNAP TS-1273AU-RP See its full HCL → QNAP TS-133 See its full HCL → QNAP TS-216G See its full HCL → QNAP TS-233 See its full HCL → QNAP TS-253E See its full HCL → QNAP TS-262 See its full HCL → QNAP TS-262A See its full HCL → QNAP TS-264 See its full HCL → QNAP TS-364 See its full HCL → QNAP TS-432PXU See its full HCL → QNAP TS-432PXU-RP See its full HCL → QNAP TS-432X See its full HCL → QNAP TS-433 See its full HCL → QNAP TS-433eU See its full HCL → QNAP TS-435XeU See its full HCL → QNAP TS-453E See its full HCL → QNAP TS-462 See its full HCL → QNAP TS-462A See its full HCL → QNAP TS-464 See its full HCL → QNAP TS-464U See its full HCL → QNAP TS-464U-RP See its full HCL → QNAP TS-464eU See its full HCL → QNAP TS-467X See its full HCL → QNAP TS-473A See its full HCL → QNAP TS-632X See its full HCL → QNAP TS-664 See its full HCL → QNAP TS-667X See its full HCL → QNAP TS-673A See its full HCL → QNAP TS-832PX See its full HCL → QNAP TS-832PXU See its full HCL → QNAP TS-832PXU-RP See its full HCL → QNAP TS-855X See its full HCL → QNAP TS-855eU See its full HCL → QNAP TS-855eU-RP See its full HCL → QNAP TS-864eU See its full HCL → QNAP TS-864eU-RP See its full HCL → QNAP TS-867X See its full HCL → QNAP TS-873A See its full HCL → QNAP TS-873AU See its full HCL → QNAP TS-873AU-RP See its full HCL → QNAP TS-873AeU See its full HCL → QNAP TS-873AeU-RP See its full HCL → QNAP TS-AI642 See its full HCL → QNAP TS-h765eU See its full HCL → QNAP TS-h966TX See its full HCL → QNAP TS-h973AX See its full HCL → QNAP TVS-h1288X See its full HCL → QNAP TVS-h1688X See its full HCL → QNAP TVS-h474 See its full HCL → QNAP TVS-h674 See its full HCL → QNAP TVS-h674T See its full HCL → QNAP TVS-h874 See its full HCL → QNAP TVS-h874T See its full HCL → QNAP TVS-h874X See its full HCL → UGREEN dh2300 See its full HCL → UGREEN dh4300-plus See its full HCL → UGREEN dxp4800 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 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 WD40EFZZ officially compatible with my NAS?

It appears on the official compatibility lists of 74 machines and series — 62 QNAP, 12 UGREEN. Every machine page linked below shows the vendor's own list entry, refreshed daily.

Is the WD40EFZZ CMR or SMR?

As a Western Digital 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 WD40EFZZ 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 WD40EFZZ 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 WD40EFZZ?

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.