On a lark, I plugged my Acer into the USB input port of a USB hub. Then I plugged a USB drive, a keyboard and a mouse into the hub. They all worked perfectly. When I plugged in a camera (as the second USB storage device) I couldn't access it. So apparently you can only use one device of USB Storage at a time. Still, if you have a keyboard with a couple USB slots on the back for a mouse and a USB Thumb drive, this could make a pretty cool home-made docking station.