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
$611 ($305.32/TB)
WDS200T4B0E
WD Blue SN5000 · 2TB · Desktop
$300 ($150.00/TB)

Value at a glance

Price / TB
WDS200T2R0A $209.54
WDS200T4B0E $150.00
Endurance (TBW)
WDS200T2R0A 1,300 TB
WDS200T4B0E 900 TB

Price history

US · cheapest per day

WDS200T2R0A $611 WDS200T4B0E $300
zoomed · drag to zoom
$856 $480 $103 Nov 2024 Mar 2025 Aug 2025 Jan 2026 Jun 2026 Nov 2026
WDS200T2R0A WDS200T4B0E
Capacity 2 TB 2 TB
Form factor 2.5 M.2
Interface SATA NVMe
NAND type TLC TLC
Endurance (TBW) 1,300 TB 900 TB
DWPD - -
DRAM cache Yes No
Power-loss protection No No
Sustained write - -
Cost / TBW $0.322 $0.333
Price / TB $209.54 $150.00
Buy
$611
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$300
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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.

WDS200T4B0E

No Backblaze failure data for this model.