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
C$990 (C$247.61/TB)
WDS400T2X0E
WD Black SN850X · 4TB · Desktop
No CA price yet

Value at a glance

Price / TB
LNM790X004T-RNNNU $125.00
WDS400T2X0E $169.75
Endurance (TBW)
LNM790X004T-RNNNU 3,000 TB
WDS400T2X0E 2,400 TB

Price history

CA · cheapest per day

LNM790X004T-RNNNU C$990
zoomed · drag to zoom
C$998 C$994 C$990 Aug 27 Aug 29 Aug 31 Sep 2 Sep 4 Sep 6
LNM790X004T-RNNNU WDS400T2X0E
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 3,000 TB 2,400 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.167 $0.283
Price / TB $125.00 $169.75
Buy
C$990
View at Amazon →
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.

LNM790X004T-RNNNU

No Backblaze failure data for this model.

WDS400T2X0E

No Backblaze failure data for this model.