WD Purple WD42PURZ - hard drive - 4 TB - SATA 6Gb/s

Built for 24/7, always-on, high-definition security systems. With a supported workload rate of up to 180 TB/yr and support for up to 64 cameras, WD Purple drives are optimized for surveillance systems. WD Purple 8TB, 10TB, 12TB & 14TB drives are designed to support Deep Learning analytics in AI capable NVRs, and feature an enhanced workload rating of up to 360TB/yr.