Verdict

For a NAS cache or write-heavy pool, the WDS400T2X0E 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
€777 (€194.24/TB)
WDS400T2X0E
WD Black SN850X · 4TB · Desktop
€835 (€208.75/TB)

Value at a glance

Price / TB
CT4000P3PSSD8 $73.15
WDS400T2X0E $169.75
Endurance (TBW)
CT4000P3PSSD8 800 TB
WDS400T2X0E 2,400 TB

Price history

ES · cheapest per day

CT4000P3PSSD8 €777 WDS400T2X0E €835
zoomed · drag to zoom
€835 €532 €230 Sep 2024 Jan 2025 Jun 2025 Nov 2025 Apr 2026 Sep 2026
CT4000P3PSSD8 WDS400T2X0E
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type QLC TLC
Endurance (TBW) 800 TB 2,400 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.366 $0.283
Price / TB $73.15 $169.75
Buy
€777
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€835
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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.

WDS400T2X0E

No Backblaze failure data for this model.