Fujitsu Mobile 2.5-inch hard drive (CA06377-B80400NK) delivering 40GB capacity with 5400 RPM spindle speed and ATA-100 interface. Features 8MB cache for improved sequential access performance. This compact form factor is designed for portable external enclosures, mobile workstations, and legacy laptop systems requiring IDE/ATA connectivity. Typical applications include external backup solutions, archival storage, and field-deployed systems where mechanical reliability and low power consumption are priorities. Compatible with external drive carriers and enclosures supporting 2.5-inch PATA drives with standard IDE connections. Tested and guaranteed; available via quote.