jdubu wrote:
Recuva is one program I find works well. Your files are still on the card, just the directory allowing you access to them has been erased. Without the directory, the card is telling the camera that those files can be overwritten.
I've used Recuva several times, not only on SD cards, also on an external hard drive.
Works great every time. Bonus: It's free. <
Depending on the brand card you use, some manufacturers also make recovery software available, but I can't speak for that as I've never used it.