Hitachi Deskstar 5K4000 4TB 3.5-inch hard drive (Part No. HDS5C4040ALE630) featuring 5400 RPM spindle speed, 32MB cache, and SATA 6GB/s interface. Designed for nearline storage in enterprise environments, NAS systems, and bulk archival applications where power efficiency and reliability take priority over performance. The 3.5-inch form factor accommodates standard server and storage enclosures. Typical throughput of 150MB/s sustained makes this drive suitable for sequential workloads and backup operations. Compatible with most server platforms and storage appliances supporting standard SATA connectivity. Tested and guaranteed; available via quote.