Fujitsu 10GB 2.5-inch mobile hard drive (part no. CA05456-B121) designed for portable computing and external storage applications. Features ATA-100 interface with 4,200 RPM spindle speed and 2MB data cache for sequential throughput typical of early 2000s mobile HDDs. The compact 2.5-inch form factor suits laptop integration and external enclosure deployment. Compatible with legacy systems requiring ATA/IDE connectivity; not suitable for modern SATA-based platforms. Typical use cases include archival storage, retired system data recovery, and retro computing projects. This unit has been tested and is guaranteed fully functional; available via quote from G5 Network Group.