The st4300usb3gb 4 port superspeed usb 30 hub allows you to add 4 additional usb 30 ports from a single usb 30 connection to the host computer system backward compatible with usb 20 and usb 1x standards this usb 30 hub still supports older usb devices and can also be used as a hub on older systems that do not have usb 30 ports with the capability to mix and match usb 30201x devices and be used with or without the included external power adapter this hub offers the best of v