ORICO W8PH4 usb 3.0 4-port hub for Laptop, Tablet-PC und Ultrabooks with USB3.0 port, supporting Mac OS X 10.8.4 (Electronics)
The unique USB3 port surface Pro ask little problems as soon as you need to use an external drive in addition to a mouse or keyboard. With this little hub, no need to bother to address this limitation.