I was using my android usb cable to transfer files from my PC with no problem. The directions on the android (2.2) tablet said to eject SD card before disconnecting from PC but at the time I did not know what that meant. Now I do. But the problem is that after disconnecting the cable, the SD card recognition is frozen and I cannot see the android on the PC as a drive any longer. What can I do the make the PC see the android as a drive again?