Designed for 24x7 CCTV, NVR, and DVR security systems, WD Purple® surveillance hard drives are engineered to handle the demanding requirements of continuous video recording in always-on environments. Featuring exclusive WD AllFrame™ technology, these drives help reduce video frame loss and improve recording and playback performance across surveillance systems supporting multiple camera streams. With workload ratings of up to 180TB per year on applicable models—up to three times the workload rating of standard desktop drives—WD Purple is built to handle the rigorous demands of mainstream video surveillance. Select models support up to 64 single-stream HD cameras and storage systems with up to 16 drive bays, while surveillance-focused features help maintain reliable operation in environments exposed to elevated temperatures and equipment vibration. Backed by a 3-year limited warranty and Western Digital’s extensive experience in surveillance-grade storage, the WD Purple family delivers dependable, high-capacity storage for modern, always-on security infrastructures.