The d link 4 port usb 20 hub dub h4 provides four additional usb 20 ports to your pc or mac allowing you to connect usb devices such as digital cameras external hard drives flash drives and printers providing data rates of up to 480mbps this 4 port hub is the ideal solution for transferring data between your computer and external usb storage devices simple plug and play designed to provide quick and easy access the dub h4 is equipped with four type a downstream ports for