Toshiba MK4026GAXB 2.5-inch hard disk drive with 40GB capacity, 5400 RPM spindle speed, and ATA-100 (PATA) interface. Features 16MB read/write cache for improved performance on sequential and random workloads. Designed for portable external storage enclosures, mobile workstations, and legacy system upgrades where ATA connectivity is required. Compatible with 2.5-inch drive bays supporting standard 44-pin IDE connectors. Typical applications include external backup storage, archival systems, and integration into vintage or industrial computing equipment that predates SATA adoption. This drive has been tested and guaranteed, available via quote.