Verdict

These are comparable SSDs. The WDS100T1R0C 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.

WDS100T1R0A
WD Red SA500 · 1TB · NAS
No CA price yet
WDS100T1R0C
WD Red SN700 · 1TB · NAS
No CA price yet

Value at a glance

Price / TB
WDS100T1R0A $397.37
WDS100T1R0C $281.97
Endurance (TBW)
WDS100T1R0A 600 TB
WDS100T1R0C 2,000 TB

Price history

CA · cheapest per day

WDS100T1R0A C$215 WDS100T1R0C C$216
zoomed · drag to zoom
C$287 C$208 C$130 Sep 2024 Jan 2025 Apr 2025 Aug 2025 Dec 2025 Mar 2026
WDS100T1R0A WDS100T1R0C
Capacity 1 TB 1 TB
Form factor 2.5 M.2
Interface SATA NVMe
NAND type TLC TLC
Endurance (TBW) 600 TB 2,000 TB
DWPD - -
DRAM cache Yes Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.662 $0.141
Price / TB $397.37 $281.97
Buy No CA price yet No CA price yet

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.

WDS100T1R0A

No Backblaze failure data for this model.

WDS100T1R0C

No Backblaze failure data for this model.