According to initial tests, it seems that the tablet does not deliver power supply to the USB port.
It's possible, but at the cost of terrible hack (finding a Y-cable and plug it into the charger, the USB stick and on the other side of the tablet. And to find this cable, it ' is the obstacle course).
Android is not involved. So this is a limitation imposed by ASUS. When is a unlock? Because wifi enter a 64-character key in hand without making a mistake, this is also the obstacle course ...
That said, a bit slow but at a little over 120, so do not ask for the moon ... Perfect for a young teen.