Silicon Power’s Stream S20 USB 3.0 hard disk Date:   Thursday , August 04, 2011 Silicon Power brings its portable hard drive Stream S20 to India. This USB 3.0 portable hard drive comes in four different models of 500GB, 640GB, 750GB and 1TB capacities. In USB 3.0 mode the device is capable of copying at 5 GB per second and 480 MB per second in USB 2.0 mode. Stream S20 needs DC 5V of power to function properly and is powered via USB. It supports operating systems including Windows 7, Windows Vista, Windows XP, Windows 2000, Linux 2.6.31 or later, and MacOS 10.4 or later. The hard disk is presently available in Purple color and comes with three years warranty. Price: Rs. 4,320 - Rs. 5,620