The external drive that I use for home videos crashed, so I'm missing videos from Christmas which were taken after my last backup. I used the free version of Disk Drill and I was able to see several of the deleted files from the SD card, so I purchased the full version so I could restore the movie files (bigger files require full version). None of the .mov or .mp4 files will open after recovered and a majority of the jpg files won't open either. Some how I got "lucky" during the free preview and every file I viewed worked fine, but none of the others.

Does anyone have any suggestions on tools to fix jpg,mov, or mp4 files? Or do you have a better option for undeleting from an SD card?