LaCie 2big Dual 1TB. Total storage capacity: 1000 GB, Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM. Cables included: eSATA, USB 2.0. Bundled software: -EMC Retrospect Express advanced backup & data restore (Mac). Weight: 2.63 kg. Compatible operating systems: -Windows 2000 + -Mac OS X 10.4 +, Minimum system requirements: eSATA / USB 2.0