Ack! You can’t access your pictures because they’re corrupted, a hard drive failed, or your memory card crashed.
Good news–you can probably recover your images with a free tool called PhotoRec. PhotoRec (and qPhotoRec) scan your disk or memory card for traces of your images and then attempt to recover them. I’ve used it many times with success.
If you use Adobe Lightroom, there’s a tool that uses the previews Lightroom automatically generates to recover a version of your pictures. The previews aren’t quite as perfect as your original photo, but they’re better than nothing!
In this 10-minute video, I show you how to use both tools. Good luck!