WD 8TB Purple Surveillance Hard Drive (3.5″ form / SATA / 128MB Cache) (WD84PURZ) Features: 8TB capacity 3.5 Inch Form Factor SATA Interface Supports up to 64 cameras enhanced workload rating More internal hard drives Uncompromising Storage with a WD Purple Surveillance Hard Drive WD Purple drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations. An average desktop drive is built to run for only short intervals. With WD Purple, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems. Multiple Cameras, Multiple Streams Modern recorders now support multiple video streams per camera. WD Purple support many of the latest cameras that transmit multiple streams to enable basic AI functionality. With so many options, you have the flexibility to upgrade or expand your security applications in the future. Designed for Today’s and Tomorrow’s Surveillance Solutions WD Purple drives are engineered for mainstream surveillance DVRs that operate 24/7. WD Purple drives deliver reliable operation even in harsh environments.