Verdict

For a NAS cache or write-heavy pool, the ZP4000GM3A063 is the safer pick - the WDS400T4B0E uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).

WDS400T4B0E
WD Blue SN5000 · 4TB · Desktop
€464 (€116.00/TB)
ZP4000GM3A063
Seagate FireCuda 530R · 4TB · Desktop
€985 (€246.27/TB)

Value at a glance

Price / TB
WDS400T4B0E $121.36
ZP4000GM3A063 $182.65
Endurance (TBW)
WDS400T4B0E 1,200 TB
ZP4000GM3A063 5,050 TB

Price history

DE · cheapest per day

WDS400T4B0E €464 ZP4000GM3A063 €985
zoomed · drag to zoom
€985 €709 €434 Aug 21 Aug 26 Aug 31 Sep 5 Sep 10 Sep 16
WDS400T4B0E ZP4000GM3A063
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type QLC TLC
Endurance (TBW) 1,200 TB 5,050 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.405 $0.145
Price / TB $121.36 $182.65
Buy
€464
View at Amazon →
€985
View at Amazon →

Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.

WDS400T4B0E

No Backblaze failure data for this model.

ZP4000GM3A063

No Backblaze failure data for this model.