I recently bought a USB sd card reader so that I could copy photos off 2 different SD cards onto the tablet when traveling. Initially it was working fine. Now however, the tablet won't detect the USB device at all. Nothing listed in Disk Manager after I plug in the USB card reader. Same thing when I have the Tablet connected to power. I can plug in a USB thumb drive/removable storage device just fine. Tablet detects it no problem. So that proves the USB port is working. So i tried the USB card reader on my desktop pc and it worked fine. Which proves the problem is not the reader, but the Tablet. what can I do? This very USB device was working fine when i first tried it.