USB cables are used to transfer any form of digital data between electronic devices such as cameras, computers, electronic instruments, and external storage devices. It is the most widely used and cost effective type of digital transfer cable. It's uses include transfer of digital files, MIDI data, stand-alone power and electronic audio as used in recording.
USB cables come in a range of versions, with USB 2.0 being standard on all recently made USB cables and sockets, and USB 3.0 starting to be appears on some new devices but not becoming standard at present.
USB Plug Types
The standard USB plug type we all know is Type A. External computer devices that are power by USB will usually have a Type B socket, requiring a USB Type A to Type B cable to be used to connect the device to a computer. USB Mini is another smaller plug type found generally on multimedia devices such as digital cameras and MP3 players.