WD Purple 4TB Surveillance Hard Drive
Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5
| Capacity | 4TB |
| Form Factor | 3.5-inch internal HDD |
| Interface | SATA 6 Gb/s |
| Rotational Speed | 5400 RPM class |
| Cache Size | Varies by model, commonly 64 MB or 256 MB |
| Workload Rating | Up to 180 TB/year |
| Camera Support | Supports up to 64 HD cameras per drive |
| Compatibility | Designed for use with DVRs and NVRs; compatible with a wide range of surveillance systems |
| Technology | Features exclusive AllFrame technology to improve video capturing and playback quality |
| Dimensions | 147 x 101.6 x 26.1 mm (L x W x H) |