The Fujitsu MHW2040AT (50 Pack) 40 GB ATA-100 is a pack of 50 internal hard drives having an ID/EIDE interface with 40 GB media and storage capacity. This mobile hard disk drive has a HDD format of 2.5 inches and is supported by laptops. The Fujitsu MHW2040AT (50 Pack) 40 GB ATA-100 has a Parallel-ATA interface and an internal enclosure. The high spindle speed of 4,200 RPM and Average Latency of 7.14ms of the Fujitsu MHW2040AT (50 Pack) 40 GB ATA-100 internal hard drive ensures a hassle-free operation. This mobile hard disk drive is low on power consumption and noise level, and produces less heat for increased battery life.