Iomega 34170 FireWire 400/USB 2.0 320GB Portable Hard Drive Includes Iomega Portable Hard Drive, USB/Supplemental power cord, FireWire 400 (1394a) cable, One Solutions CD containing - Touch-Free automated backup and disaster recovery software included for PC/Mac, HTML User Manual and Help Files, and Quick Install Guide FAT32 Preformatted Fast 5400 RPM 8MB Cache Buffer System Requirements - 300mhz processor or higher, USB or FireWire connection, Microsoft Windows Vista, 2000, 2000 Professional, XP Home, XP Professional x64, Mac OS X 10.1 or higher, 4x CD-ROM drive or higher, 65MB free space for installation of supporting software, 256MB RAM or more