WDS400T2R0A
WD Red SA500 · 4TB
TLC
SATA ✓ DRAM cache
£699
(£174.75/TB)
Best price at Amazon · UK
Last checked Oct 8, 2026 · Price and availability subject to change.
Specifications
- Capacity
- 4 TB
- Interface
- SATA
- Form factor
- 2.5"
- Class
- NAS
- NAND
- TLC
- Endurance
- 2,500 TB
- DRAM cache
- ✓
- Power-loss protection
- ✗
- Sustained write
- -
- Data confidence
- High
Endurance
Rated endurance (TBW)2,500 TB written
Drive writes per day-
Power-loss protectionNo
Endurance is the manufacturer's warranty rating (TBW / DWPD), not a measured failure rate - SSDs aren't in Backblaze's HDD-focused failure data.
Price history
UK · cheapest per day
£699 latest
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