Verdict

These are comparable SSDs. The ZA4000NM1A002 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.

MZ-V9P4T0
Samsung 990 PRO · 4TB · Desktop
No CA price yet
ZA4000NM1A002
Seagate IronWolf 125 · 4TB · NAS
No CA price yet

Value at a glance

Endurance (TBW)
MZ-V9P4T0 2,400 TB
ZA4000NM1A002 5,600 TB

Price history

CA · cheapest per day

MZ-V9P4T0 C$983
zoomed · drag to zoom
C$1,076 C$728 C$380 Aug 2024 Dec 2024 Apr 2025 Aug 2025 Nov 2025 Mar 2026
MZ-V9P4T0 ZA4000NM1A002
Capacity 4 TB 4 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type TLC TLC
Endurance (TBW) 2,400 TB 5,600 TB
DWPD - 0.7
DRAM cache Yes Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.267 -
Price / TB $160.31 -
Buy No CA price yet 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.

MZ-V9P4T0

No Backblaze failure data for this model.

ZA4000NM1A002

No Backblaze failure data for this model.