USB 3.0, the latest version of USB (Universal Serial Bus), provides better speed and more efficient power management than USB 2.0. USB 3.0 is backward compatible with USB 2.0 devices; however, data transfer speeds are limited to USB 2.0 levels when these devices inter-operate. Usb 2.0 High Speed or HS, 480 Mbps (Megabits per second) Usb 3.0 10 times faster than USB 2.0. Super Speed or SS, 4.8 Gbps (Giga bits per second)