My Card Can't Be Read ... And Thinks It's Write-Protected
I had an SD card get corrupted too. I tried a recovery tool, but my system doesn't even recognize that this SD card is present when I insert it into the external USB-connected reader.
I stuck it back into the camera and the camera reports it needs to be formatted, BUT to make matters worse, the camera thinks the card is write-protected.
I haven't tried yet, but if nothing else works, I was thinking about trying to "degauss" the card with a powerful magnet taken from an old hard drive to see if that wouldn't allow me to format the card.