Hi I recently purchased a sony 64 gig usb flash drive....it was working perfectly fine until i tried to delete all the data on it...a message kept appearing which said the files were corrupted and unreadable...what have I done wrong ? I tried formatting it but it would nt work,it said it was 64 gig but all the rest of the drop down boxes were blank and it would nt start the reformat process. I had previously synched it to windows media player. Please please please can someone help? I paid a fortune for it ! Thanks .