Verdict

For a NAS cache or write-heavy pool, the WDS800T1X0M is the safer pick - the MZ-77Q8T0 uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).

MZ-77Q8T0
Samsung 870 QVO · 8TB · Desktop
$1,460 ($182.50/TB)
WDS800T1X0M
WD Black SN8100 · 8TB · Desktop
$2,199 ($274.88/TB)

Value at a glance

Price / TB
MZ-77Q8T0 $182.50
WDS800T1X0M $219.00
Endurance (TBW)
MZ-77Q8T0 2,880 TB
WDS800T1X0M 4,800 TB

Price history

US · cheapest per day

MZ-77Q8T0 $1,460 WDS800T1X0M $2,199
zoomed · drag to zoom
$2,500 $1,509 $519 Oct 2024 Mar 2025 Aug 2025 Jan 2026 May 2026 Oct 2026
MZ-77Q8T0 WDS800T1X0M
Capacity 8 TB 8 TB
Form factor 2.5 M.2
Interface SATA NVMe
NAND type QLC TLC
Endurance (TBW) 2,880 TB 4,800 TB
DWPD - -
DRAM cache Yes Yes
Power-loss protection No No
Sustained write 160 MB/s -
Cost / TBW $0.507 $0.365
Price / TB $182.50 $219.00
Buy
$1,460
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$2,199
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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-77Q8T0

No Backblaze failure data for this model.

WDS800T1X0M

No Backblaze failure data for this model.