My father connected a usb sd card reader to the Galaxy tab 10.1 through its usb port adapter, and it apparently deleted all the contents off the card. The card is still properly formatted, but shows as empty. Interestingly enough, I cannot find any trace of the files on the galaxy tab. I ran a file-recovery tool on the card, to no avail. Also interestingly, the files that I was able to recover were from last year. Does anyone have any knowledge or suggestions on how to go about recovering these files? Thank you for your time.