Iogear 2.5IN USB 2.0 40 GB HARD DRIVE ( GHD225U40W4 ) Iogear GHD225U40W4 40 GB 2.5" USB 2.0 External Hard Drive General Features: 40 GB formatted capacity USB 2.0 interface (backwards compatible to USB 1.1) 480 Mbps data transfer rate (USB 2.0) 5400 RPM spindle speed UDMA/100 data transfer rate (hard drive) BUS powered Hot-swappable Plug and Play compatible Removable belt clip Virtually indestructable metal and plastic housing Unit Dimensions: