The 4TB 3.5" Hard Drive is a reliable storage solution designed for surveillance systems. With a 64MB cache and 5,400 RPM rotational speed, it offers smooth performance and fast data transfer speeds. This SATA 6.0 Gb/s hard drive provides ample 1TB capacity to store your surveillance footage. The 3.5" form factor allows for easy installation in desktop PCs, NVRs, or DVRs. Upgrade your security system with this high-endurance drive for continuous, 24/7 operation.