Western Digital 4TB Purple SATA Surveillance Hard Drive, Up to 175 MB/s Transfer Rate, 128 MB Cache Size, CMR Recording Technology | WD44PURZ

WD Purple Surveillance Hard Drive Uncompromising Storage with a WD Purple Surveillance Hard Drive WD Purple™ 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, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems, and some of our latest models (WD22PURZ, WD42PURZ, and WD63PURZ) have improved power efficiency. Exclusive AllFrame™ technology helps reduce frame loss and improve overall video playback. Specifications Capacity 4 TB Form Factor 3.5-inch Connector SATA Interface SATA Transfer Rate Up to 175 MB/s Disk Speed (RPM) — Recording Technology CMR Cache Size 128 MB Dimensions (L × W × H) 147 × 101.6 × 26.1 mm Weight 0.55 kg Model Number WD44PURZ Operating Temperature 0 °C to 65 °C Non-Operating Temperature −40 °C to 70 °C Certifications BSMI, ICES-003/NMB-003, CE, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB-Scheme, TUV, UL