Verdict

For a NAS cache or write-heavy pool, the WDS400T2R0A is the safer pick - the CT4000P3PSSD8 uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).

CT4000P3PSSD8
Crucial P3 Plus · 4TB · Desktop
€479 (€119.75/TB)
WDS400T2R0A
WD Red SA500 · 4TB · NAS
€919 (€229.75/TB)

Value at a glance

Price / TB
CT4000P3PSSD8 $73.15
WDS400T2R0A $221.93
Endurance (TBW)
CT4000P3PSSD8 800 TB
WDS400T2R0A 2,500 TB

Price history

DE · cheapest per day

CT4000P3PSSD8 €479 WDS400T2R0A €919
zoomed · drag to zoom
€1,017 €614 €210 Oct 2024 Mar 2025 Jul 2025 Dec 2025 May 2026 Oct 2026
CT4000P3PSSD8 WDS400T2R0A
Capacity 4 TB 4 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type QLC TLC
Endurance (TBW) 800 TB 2,500 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.366 $0.355
Price / TB $73.15 $221.93
Buy
€479
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€919
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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.

CT4000P3PSSD8

No Backblaze failure data for this model.

WDS400T2R0A

No Backblaze failure data for this model.