I can't get my acer to recognize any usb drives. i tried a scandisk, lexar and kingston. From 4gb, 8gb to 16gb, all dont work. I tried shutting it off and then plugging the usb drive in and then turning on the tablet and still nothing. Really driving me nuts. Whats the point of putting a usb slot if it doesnt even work. Any help would be much appreciated. thanks!