The Iomega REV ? 35 GB/90 GB Internal SATA drive is a removable hard disk system that provides portable, high-performance file storage. It offers native storage capacity of up to 35 GB and delivers a high data transfer rate of up to 25 MBps. It offers up to 90 GB compressed storage capacity with 'high' compression on Iomega Automatic Backup Pro software. The REV ? drive comes with Iomega Automatic Backup Pro software that provides a 'set it and forget it' solution to backup your files on a scheduled or continuous basis and at the same time secures your data with its password protection and encryption features. This internal drive fits in a 3.5" bay or a 5.25" bay with the included mounting hardware, which can installs easily into your desktop tower. This internal drive saves space on your desktop and comes with a SATA data cable, a Legacy 4-pin to SATA power adapter/cable and a REV ? disk.