difference between usb2 0 and USB3 0

USB2.0 USB2.0 in terms of speed, high speed or HS, 480 Mbps (megabits per second),USB3.010 times faster than USB 2. Ultra high speed or SS, 4.8 Gbps (gigabit per second).In the instruction method, the USB2.0 polling mechanism can send or receive data (half duplex), USB3.0 asynchronous mechanism, that can send and receive data simultaneously (Quan Shuanggong).In terms [...]