thanks blade dreams and pool shark, tried both things nothing shows just replaced sd card and doing clean re install of b21... only draw back is all pictures that were lost have to start backing up sd card more often now... cant take that chance again...
I have seen many different things cause SD card corruption.
If you have an SD card reader in your pc, put the card in, open cmd and type this:
chkdsk /X /F driveletter:
Drive letter is the letter of the SD card the pc assigns.