Verdict

These are comparable SSDs. The WDS200T2R0A 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.

WDS200T2R0A
WD Red SA500 · 2TB · NAS
€489 (€244.25/TB)
WDS200T2X0E
WD Black SN850X · 2TB · Desktop
€654 (€327.09/TB)

Value at a glance

Price / TB
WDS200T2R0A $209.54
WDS200T2X0E $208.85
Endurance (TBW)
WDS200T2R0A 1,300 TB
WDS200T2X0E 1,200 TB

Price history

IT · cheapest per day

WDS200T2R0A €489 WDS200T2X0E €654
zoomed · drag to zoom
€678 €344 €10 Nov 2024 Mar 2025 Aug 2025 Jan 2026 Jun 2026 Nov 2026
WDS200T2R0A WDS200T2X0E
Capacity 2 TB 2 TB
Form factor 2.5 M.2
Interface SATA NVMe
NAND type TLC TLC
Endurance (TBW) 1,300 TB 1,200 TB
DWPD - -
DRAM cache Yes Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.322 $0.348
Price / TB $209.54 $208.85
Buy
€489
View at Amazon →
€654
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.

WDS200T2R0A

No Backblaze failure data for this model.

WDS200T2X0E

No Backblaze failure data for this model.