The G-Technology G-RAID mini 1TB Dual-Drive Storage System is a versatile dual-drive bus powered storage system with a variety of ports including two FireWire 800 ports, 1 3Gbit eSATA port and one USB 2.0 port. Along with the variety of connection options, you can take advantage of a 32MB cache and a 7200 RPM disk speed ensuring you can read and write to your drive quickly and efficiently.