Verdict

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

WD102KRYZ
WD Gold · 10TB · Enterprise
No DE price yet
WUS721010ALE6L4
WD Ultrastar DC HC330 · 10TB · Enterprise
No DE price yet

Value at a glance

Price / TB
WD102KRYZ $55.08
WUS721010ALE6L4 $39.69
Capacity
WD102KRYZ 10 TB
WUS721010ALE6L4 10 TB

Price history

DE · cheapest per day

WD102KRYZ €470 WUS721010ALE6L4 €716
zoomed · drag to zoom
€749 €504 €259 Sep 2024 Feb 2025 Jul 2025 Nov 2025 Apr 2026 Sep 2026
WD102KRYZ WUS721010ALE6L4
Capacity 10 TB 10 TB
Recording tech CMR CMR
RAID / NAS safe Yes Yes
Class Enterprise Enterprise
Spindle speed 7200 RPM 7200 RPM
Cache 256 MB 256 MB
Noise (idle) 20 dB -
Fill Helium Air
Interface SATA SATA
Failure rate (AFR) - -
Price / TB $55.08 $39.69
Buy No DE price yet No DE 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.

WD102KRYZ

No Backblaze failure data for this model.

5yr warranty · 550 TB/yr rated · 2,500,000h MTBF

WUS721010ALE6L4

No Backblaze failure data for this model.

5yr warranty · 550 TB/yr rated · 2,500,000h MTBF