What are the differences between USB 1.1, USB 2.0, USB 3.0 and USB 3.1?

USB 1.1, the earliest USB interface standard, supports lower speed devices such as keyboards and mice. Depending on the device, USB 1.1 can operate in two modes: low speed and full speed. USB 1.1 delivers data transfer speeds of 1.5 Mbps in low mode and 12 Mbps in full mode.

USB 2.0 is a newer version. Compared with USB1.1, the storage device with the USB 2.0 standard interface has a faster read/write speed. For example, the USB disk and USB hard disk with the USB 2.0 interface can run in high-speed mode, and the data transfer rate can reach up to 480 Mbps.

USB 3.0, a newer version of USB 2.0, can operate in ultra-fast mode with data transfer rates of up to 5 Gbps. Today, most computer systems and USB drives support USB 3.0 ports. USB 3.1, the latest version of the current version, operates in ultra-fast mode with data transfer rates up to 10 Gbps.

Maximum USB     data transfer speed

USB 1.1 Full Speed Mode 12 Mbps
USB 2.0 High Speed Mode 480 Mbps
USB 3.0 Ultra High Speed Mode 5 Gbps
USB 3.1 Ultra High Speed Mode 10 Gbps