LaCie 320 GB D2 Hard Drive USB 2.0/Firewire 400 & 800 (301146U) Capacity - 320 GB /Interface - 2 x FireWire 800 (9-pin) ports /1 x FireWire 400 (6-pin) port (compatible with iLink, DV)/ 1 x Hi-Speed USB 2.0 (compatible with USB 1.1) Rotational Speed (rpm) - 7200 /Interface Transfer Rate - FireWire 800 - up to 800Mbits/s (100MB/s) /FireWire 400 - up to 400Mbits/s (50MB/s) /USB 2.0 - up to 480Mbits/s (60MB/s) /Max Sustained Transfer Rate - FireWire 800 - up to 64MB/s / FireWire 400 - up to 42MB/s /USB 2.0 - up to 34MB/s / Average Seek Time (Write) - &lt;10 ms /Cache Size - 8MB minimum Software Configuration - Driver-free for Windows XP/2000 or Mac OS X; Silverlining for Mac OS 9; Silverkeeper for backup with Mac OS 9 & Max OS X System Requirements - FireWire 800 equipped computer - Mac OS 10.2 or greater or Windows 2000/XP/Vista /FireWire 400 or iLink equipped computer - Mac OS 9.x/10.x or Windows 2000/XP/Vista /Hi-Speed USB 2.0 equipped computer - Mac OS 10.2.x or greater or Windows 2000/XP/Vista / USB 1.1 equipped computer - Mac OS 9.x/10.x or Windows 2000/XP/Vista / Intel Pentium II 350MHz-compatible or Apple G3/G4/G5/Intel processor; minimum 64MB RAM (Apple G4 processor required for use with FireWire 800) Box Contents - FireWire 800 to FireWire 800 cable; FireWire 400 to FireWire 400 cable; iLink/DV cable; Hi-Speed USB 2.0 cable (USB 1.1 compatible); Drive stand; External power supply; LaCie Storage Utilities CD-ROM including - Silverlining Utilities (Mac OS 9) for advanced drive management, and SilverKeeper (for Mac) software for automatic backup and file verification