Verdict

These are closely matched SSDs of the same capacity - decide on price and warranty. Check the live $/TB above.

MZ-V9S4T0BW
Samsung 990 EVO Plus · 4TB · Desktop
$748 ($187.00/TB)
MZ-VAP4T0BW
Samsung 9100 PRO · 4TB · Desktop
$981 ($245.34/TB)

Value at a glance

Price / TB
MZ-V9S4T0BW $187.00
MZ-VAP4T0BW $245.34
Endurance (TBW)
MZ-V9S4T0BW 2,400 TB
MZ-VAP4T0BW 2,400 TB

Price history

US · cheapest per day

MZ-V9S4T0BW $748 MZ-VAP4T0BW $981
zoomed · drag to zoom
$1,129 $664 $200 Nov 2024 Mar 2025 Aug 2025 Jan 2026 Jun 2026 Nov 2026
MZ-V9S4T0BW MZ-VAP4T0BW
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 2,400 TB 2,400 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.312 $0.409
Price / TB $187.00 $245.34
Buy
$748
View at Amazon →
$981
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.

MZ-V9S4T0BW

No Backblaze failure data for this model.

MZ-VAP4T0BW

No Backblaze failure data for this model.