How to recover erased .RW2 and other RAW files from SDHC cards
I recently lost all my GF1 photos from my SDHC card. After shooting about 70 photos, I put the card in a USB reader and it appeared to be empty on my computer. There are several free programs that will recover JPEG images from cameras’ memory cards, but recover RAW files—especially those from non-Canon/Nikon cameras—can be a little more difficult. Fortunately, there’s a free, open source program, PhotoRec, that will recover your deleted image files. You should note that once your files have been deleted, you should not continue to shoot any photos with the card in your camera. Any additional photos may overwrite the deleted photos that you want to recover.