G-Technology G-DRIVE Professional External Hard Drive 3TB (Gen6, USB 3.0/eSATA/FireWire800) (0G02923) Transfer rates up to 165MB/s "Fan-less" design with unique silent cooling technology High-performance 7200 RPM SATA III drives with up to 64MB cache Apple Time Machine compatible USB 3.0/2.0, eSATA, FireWire 800