Verdict

These are comparable SSDs. The WDS200T2X0E 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.

WDS200T2X0E
WD Black SN850X · 2TB · Desktop
€657 (€328.45/TB)
WDS200T4B0E
WD Blue SN5000 · 2TB · Desktop
€323 (€161.50/TB)

Value at a glance

Price / TB
WDS200T2X0E $208.85
WDS200T4B0E $150.00
Endurance (TBW)
WDS200T2X0E 1,200 TB
WDS200T4B0E 900 TB

Price history

ES · cheapest per day

WDS200T2X0E €657 WDS200T4B0E €323
zoomed · drag to zoom
€889 €496 €103 Nov 2024 Mar 2025 Aug 2025 Jan 2026 Jun 2026 Nov 2026
WDS200T2X0E WDS200T4B0E
Capacity 2 TB 2 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 1,200 TB 900 TB
DWPD - -
DRAM cache Yes No
Power-loss protection No No
Sustained write - -
Cost / TBW $0.348 $0.333
Price / TB $208.85 $150.00
Buy
€657
View at Amazon →
€323
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.

WDS200T2X0E

No Backblaze failure data for this model.

WDS200T4B0E

No Backblaze failure data for this model.