I-O Data has only recently begun shipping the 1TB and 2TB HDCA-UT series external hard drives and already it is preparing a 3TB HDD complement them. The upcoming 3TB drive has an USB 3.0 interface, it measures 39 (W) x 185 (D) x 120 (H) mm, and can be installed both vertically and horizontally.
I-O Data's HDCA-UT3.0K is backed by a one-year warranty and is set to go on sale in mid-May at about $323.

Source : tcmagazine.com