One day, I'll delete a valued photo from a memory card and want to recover it. I've done it in the past.
Recuva may just help save you.
I used it to recover photos for a friend who accidentally deleted their whole memory card with important family photos on it, and it restored all but one of the photos. (The key is to stop using the card right away so data is not overwritten.)
Now it's here for me to look it up, and you too!