The Fujitsu Mobile 40GB 2.5" IDE Hard Drive is a reliable internal laptop drive that offers a storage capacity of 40GB. With a rotation speed of 5400 RPM and a read speed of 500MB/s, this silver hard drive is compatible with laptops and provides a fast transfer rate of 150 Mbps. It is designed for use with HDD drive types and has an 8MB cache for efficient data processing. This tested and working unit is part of the Mobile product line by Fujitsu, making it a dependable storage solution for your computing needs.