Connect 4sx four port usb 30 hub usb 30 superspeed connectivity usb bus powered supporting 1 tb external hard drive and 3 usb flash drives simultaneously four port usb 30 hub plug and play usb bus powered supporting 1 tb external hard drive and 3 usb flash drives simultaneously usb 30 port backward compatible with usb 20 specifications application 4 ports usb 30 hub standards usb 30 usb 20 backwards compatible power mode usb powered