The Western Digital WD Purple 4TB (model WD43PURZ) is a high-capacity internal hard drive designed specifically for surveillance systems requiring reliable, always-on operation. Built to handle the intense workloads and continuous 24/7 operation of network video recorders (NVRs) and digital video recorders (DVRs), this 3.5-inch SATA HDD combines a large 4TB storage capacity with surveillance-optimized firmware — WD's exclusive AllFrame™ technology — that reduces video frame loss and improves playback quality in write-heavy, multi-stream environments.

Key features include a 256MB cache for smoother data handling, a SATA 6 Gb/s interface for fast data transfer, and vibration and heat resistance to withstand the challenges of surveillance environments. It supports up to 64 HD cameras (model and system dependent) for extensive security setups and boasts a workload cycle rating of up to 180 TB/year to meet demanding video archival requirements. The drive spins at 5400 RPM, balancing quiet operation with power efficiency.

The WD Purple 4TB drive comes backed by a 3-year limited manufacturer warranty, reflecting Western Digital's confidence in its durability and performance in demanding surveillance applications. Whether for commercial or residential security systems, the WD Purple delivers dependable, surveillance-class storage tailored for continuous video monitoring and recording.

Ideal for:

• Multi-camera surveillance DVRs and NVRs


• CCTV systems with high-definition video streams


• Continuous 24/7 recording environments