# Western Digital Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5"

- Category: Storage
- Brand: Western Digital
- Model: WD4001FFSX
- Part number: WD4001FFSX
- Price (US): $440.00
- Price last checked: 2026-08-05
- Rating: 4.3/5 from 108 Amazon reviews
- Warranty: 5 years
- Product page: https://buildmypc.net/component-details/storage/western-digital-wd4001ffsx/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | Western Digital |
| Model | WD4001FFSX |
| Maximum Capacity | 4 TB |
| Form Factor | 3.5" (HDD) |
| Cache Memory | 64 MB |
| Interface | SATA 6 Gb/s |

## Key Features

- Enhanced reliability with 3D Active Balance Plus and error recovery prevention with NASware 3.2
- Extended drive testing to ensure each drive for extended reliable operation
- Most extensive NAS partner compatibility-testing list available
- 5-year manufacturer limited warranty
- Package includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary.

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