Verdict

For a NAS cache or write-heavy pool, the MZ-V9P4T0 is the safer pick - the MZ-77Q4T0 uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).

MZ-77Q4T0
Samsung 870 QVO · 4TB · Desktop
No CA price yet
MZ-V9P4T0
Samsung 990 PRO · 4TB · Desktop
C$1,500 (C$375.00/TB)

Value at a glance

Price / TB
MZ-77Q4T0 $219.36
MZ-V9P4T0 $164.78
Endurance (TBW)
MZ-77Q4T0 1,440 TB
MZ-V9P4T0 2,400 TB

Price history

CA · cheapest per day

MZ-77Q4T0 C$542 MZ-V9P4T0 C$1,500
zoomed · drag to zoom
C$1,500 C$937 C$375 Sep 2024 Jan 2025 Jun 2025 Oct 2025 Feb 2026 Jul 2026
MZ-77Q4T0 MZ-V9P4T0
Capacity 4 TB 4 TB
Form factor 2.5 M.2
Interface SATA NVMe
NAND type QLC TLC
Endurance (TBW) 1,440 TB 2,400 TB
DWPD - -
DRAM cache Yes Yes
Power-loss protection No No
Sustained write 160 MB/s -
Cost / TBW $0.609 $0.275
Price / TB $219.36 $164.78
Buy No CA price yet
C$1,500
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-77Q4T0

No Backblaze failure data for this model.

MZ-V9P4T0

No Backblaze failure data for this model.