Verdict

These are comparable SSDs. The LNM790X004T-RNNNU 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.

LNM790X004T-RNNNU
Lexar NM790 · 4TB · Desktop
No DE price yet
WDS400T2R0A
WD Red SA500 · 4TB · NAS
€922 (€230.50/TB)

Value at a glance

Price / TB
LNM790X004T-RNNNU $145.00
WDS400T2R0A $221.93
Endurance (TBW)
LNM790X004T-RNNNU 3,000 TB
WDS400T2R0A 2,500 TB

Price history

DE · cheapest per day

LNM790X004T-RNNNU €1,047 WDS400T2R0A €922
zoomed · drag to zoom
€1,047 €663 €279 Sep 2024 Feb 2025 Jul 2025 Dec 2025 Apr 2026 Sep 2026
LNM790X004T-RNNNU WDS400T2R0A
Capacity 4 TB 4 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type TLC TLC
Endurance (TBW) 3,000 TB 2,500 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.193 $0.355
Price / TB $145.00 $221.93
Buy No DE price yet
€922
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.

LNM790X004T-RNNNU

No Backblaze failure data for this model.

WDS400T2R0A

No Backblaze failure data for this model.