This is software we don't use very often, but when we do, it is always INVALUABLE! Many times we accidentally delete our digital photos, or the camera may goof and the data becomes corrupted to where we can't upload the photos already taken.
This little piece of software, PhotoRec, can search a memory device on the computer, and recover the audio, pictures, video, or text files off the memory stick. It is FANTASTIC!
The download can be found here - http://www.cgsecurity.org/wiki/TestDisk_Download
Its simple and easy to use - basic DOS-like commands.
We strongly recommend a donation to Christophe for the great tool this is.
Over the years we've bought memory cards, cameras, and Trail Cameras (for putting in the woods looking for animals) off ebay and Craigslist... you might THINK you have deleted those photos, but they are still on the card! One guy sent us a Trail Cam with hundreds of pictures of his honeymoon in Mexico on the SD Memory card...