I've just bought a A1CS X220 tablet and am having with getting USB Memory Sticks to play. When I plug the stick in it comes up with a message that recognises the devise but it doesn't appear on the screen so I don't know how to open it or remove it. When I took the stick out I had another message which said USB unexpectily removed. This is driving me made as I can't transfer files from my pc to my new tablet.I have also tried connecting my tablet to my pc using a USB cable but that is not even recognised. Please can someone help me with this problem. Lesley505