WD Purple 8TB Surveillance Hard Drive
| Capacity | 8TB |
| Form Factor | 3.5-inch internal HDD |
| Interface | SATA 6 Gb/s |
| Disk Speed | 5640 RPM or 7200 RPM depending on the specific model (e.g., WD85PURZ is 5640 RPM, Pro models can be 7200 RPM) |
| Cache Size | 256 MB (some older models may have 128MB) |
| Workload Rating | Up to 180 TB/year |
| Camera Support | Supports up to 64 high-definition cameras per drive |
| Technology | Exclusive AllFrame technology to help reduce frame loss and improve video playback |
| Compatibility | Built for compatibility with a wide range of DVR and NVR systems |