I have an Acer Iconia A100 tablet. When I mount an 32 GB micro sd card and copy data on it, I find that within a short amount of time the card is filled with files that are not labeled with standard English letters, but gibberish that looks like code. When I link to my PC with the usb cord, these files come up as unreadable and it is impossible to delete them. I have tried using the Unlocker program, but it does not work on these files, When I check their size, it shows 100's of gb's of data (which is of course not possible). I have formatted the card several times, wiping all data on the card, but the same problem keeps occurring. I have avast antivirus on the tablet, but no viruses are detected. Any ideas as to what is going on?