If you had copied the contents of the card at an earlier date to a folder saved on your PC , you could format the corrupted card in the card reader, then copy the files of the saved folder back to the to the card. I already have a spare 16 GB 30 mbps card I used in it before the update period expired , that I know worked and I copied the contents to a folder in my PC and then to a new 16GB 40mbps card that I presently use in it. If I have problems , I'll put the older one back in