Verdict

These are comparable SSDs. The WDS200T4X0E is rated for the most write endurance, so it lasts longest in a NAS that sees steady writes; for light use any is fine and price decides.

WDS200T4B0E
WD Blue SN5000 · 2TB · Desktop
£247 (£123.67/TB)
WDS200T4X0E
WD Black SN7100 · 2TB · Desktop
£280 (£139.98/TB)

Value at a glance

Price / TB
WDS200T4B0E $135.39
WDS200T4X0E $157.59
Endurance (TBW)
WDS200T4B0E 900 TB
WDS200T4X0E 1,200 TB

Price history

UK · cheapest per day

WDS200T4B0E £247 WDS200T4X0E £280
zoomed · drag to zoom
£379 £309 £240 Aug 21 Aug 26 Aug 31 Sep 5 Sep 10 Sep 16
WDS200T4B0E WDS200T4X0E
Capacity 2 TB 2 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 900 TB 1,200 TB
DWPD - -
DRAM cache No No
Power-loss protection No No
Sustained write - -
Cost / TBW $0.301 $0.263
Price / TB $135.39 $157.59
Buy
£247
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£280
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.

WDS200T4B0E

No Backblaze failure data for this model.

WDS200T4X0E

No Backblaze failure data for this model.