# Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5"

- Category: Storage
- Brand: Western Digital
- Model: WD40PURZ
- Part number: WD40PURZ
- Price (US): $228.00
- Price last checked: 2026-08-05
- Rating: 4.6/5 from 6335 Amazon reviews
- Warranty: 4 years
- Product page: https://buildmypc.net/component-details/storage/western-digital-wd40purz/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | Western Digital |
| Model | WD40PURZ |
| Maximum Capacity | 4 TB |
| Form Factor | 3.5" (HDD) |
| Cache Memory | 64 MB |
| Interface | SATA 6 Gb/s |

## Key Features

- Built for 24/7 surveillance
- AllFrame technology for better performance
- Designed to support up to 64 HD cameras
- Engineered for compatibility
- 3-year manufacturer's limited warranty

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