Usually I copy photos from digital camera SD card to computer and leave a copy in SD card in case something will go wrong. And once it happened.
I saw, that half of photos in computer are corrupted and can’t be displayed. But somehow I didn’t copy them, but moved. So I had no backup copy left in SD card.
Firstly I looked on internet for an advice. I tried several recovery tools. The most successfully was Pandora Recovery, because other tools didn’t find deleted files on SD card or were not able to restore deleted photos.
So I highly recommend to try Pandore Recovery if your problem is similar to mine. I hope you will be lucky, because to lose your memories saved in photos for me is a tragedy
Also sometimes I use simpler tool called Simple Unrecover Deleted Files, which didn’t help in this case.