WD Purple WD85PURZ 8TB Surveillance Hard Drive, specifically engineered for surveillance systems. This 3.5" internal drive boasts a substantial 8TB formatted capacity, coupled with a 256MB cache, ensuring smooth data flow and storage. Featuring SATA 6Gb/s interface for high-speed data transfer and Western Digital's exclusive AllFrame™ technology, it significantly reduces frame drops, making it ideal for 24/7 security environments. Fast dispatch and delivery across the country ensures your security system is upgraded without delay.