Hard Disk Western Digital Purple 4TB, 3.5″, 128MB cache, SATA-III

Hard Disk Western Digital Purple 4TB, 3.5″, 128MB cache, SATA-III The Hard Disk Western Digital Purple 4TB drives are designed to meet the challenges of 24×7 video surveillance recording. These drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. With WD Purple drives, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems. Exclusive AllFrame™ technology helps reduce frame loss and improve overall video playback. Features Hard disk 3.5″ Capacity:  4TB Interface: SATA III Form Factor: 3.5 Inch Recording Technology: CMR Compatibility: WD Purple surveillance storage is built to handle up to 64 cameras per drive and is designed for 24/7, always on, high-definition surveillance security systems with more than eight bays2. Dimensions (L x W x H) 147mm x 101.6mm x 26.1mm New and Original product with the quality of Western Digital.