The ST4300USB3GB 4-Port Super Speed USB (Universal Serial Bus) 3.0 Hub means that you can add 4 additional USB (Universal Serial Bus) 3.0 ports from a single USB (Universal Serial Bus) 3.0 connection to the host computer system. Backward compatible with USB (Universal Serial Bus) 2.0 & USB (Universal Serial Bus) 1.x standards, this USB (Universal Serial Bus) 3.0 hub still supports older USB