The WD40PURX is a 4TB Hard Disk Drive from Western Digital's Purple series, designed specifically for surveillance applications. Featuring a 3.5" form factor and a SATA interface with 6Gb/s transfer rate, it ensures reliability and performance in high-definition security systems. This HDD comes with a 64MB cache, enhancing data retrieval speeds. Engineered for 24/7 operation in high-definition security systems, the WD40PURX is built to withstand the demands of continuous video recording, offering low power consumption, high capacity, and increased workload capability. The Purple series drives integrate AllFrame technology to reduce frame loss and improve overall video playback, making this drive a top choice for security and surveillance systems.