# WD Blue SSHD 4TB Desktop Hard Disk Drive - SATA 6 Gb/s 64MB Cache 3.5 Inch

- Category: Storage
- Brand: Western Digital
- Model: WD40E31X
- Part number: WD40E31X
- Price (US): currently unavailable
- Price last checked: 2026-08-05
- Rating: 4.1/5 from 105 Amazon reviews
- Warranty: 3 years
- Product page: https://buildmypc.net/component-details/storage/western-digital-wd40e31x/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | Western Digital |
| Model | WD40E31X |
| Maximum Capacity | 4 TB |
| Form Factor | 3.5" (SSHD) |
| Cache Memory | 8 MB |
| Interface | SATA 6 Gb/s |

## Key Features

- 8 GB of NAND flash for blazing SSD-like performance
- Up to 5x faster than traditional 5400 rpm HDDs
- Designed for power PC users, creative professionals, gamers and system builders
- 3-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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