(Not my personal story, thankfully, but I know what to do if it does)!
It’s probably every photographer’s worst nightmare. You’ve shot gigabytes worth of images, ready to be imported for post-processing, when suddenly: card is unreadable. Your captures are all gone. All that time and effort lost to a corrupted card. It happened to me, and this is how I got them back.
A while back, I shot a few hundred pictures of a couple of live band performances. Later that night, I stuck the 16GB SD card into my laptop, started the Lightroom import, and went to bed. The next morning I checked the laptop to find that there were only 50 files imported, plus an ominous message that most of the files were unreadable. I opened the Finder to peek at the files directly, and they were all seemingly there, but couldn’t be previewed or opened — again, “unreadable.”