Internal WD Purple 4TB Hard Drive HDD – SATA 6 Gb/s, 64 MB Cache, 3.5″

From the manufacturerWD Purple Surveillance Hard Disk DriveBuilt 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.AllFrame 4KTM TechnologyReduces frame lossImproves video playbackOptimizes the HDD to thrive in high temperature, always-on, surveillance system environmentsEngineered for compatibilityWD Purple surveillance hard drives are built for compatibility with chassis and chip set manufacturers for seamless integration into your new or existing video surveillance system.Optimized performance for up to 64 camerasWith support for up to 64 surveillance cameras per hard drive, WD Purple gives you the flexibility to upgrade and expand your security system in the future.Surveillance storage for peace-of-mindWD Purple Surveillance hard drives are designed for high temperature, always-on, surveillance security systems to help ensure reliability and quality video play back when you need it most.