I was taking photos the other day at Glacier National Park and halfway through the afternoon the previews stopped showing up on my camera. After inserting the card into my computer I found that the second half of the batch were all the proper size for a photo but are giving me the error "may be damaged or use a file format that is unrecognizable".
I've tried every photo recovery software I could find and they all do not even recognize the files. I tried downloading iHex to possibly remove a damaged header but the photos show up showing only Fs' on every line (I've never used this program before so may be user error). I have not done anything to the SD card itself besides make a copy of the photos on my computer. I also tried converting to JPG with no luck.
Any ideas?
I've uploaded 4 photos: https://drive.google.com/folderview?id=0Bwvjk4sXOF52MUtpZXY1TTFFcDQ&usp=sharing
7829 is the last good photo, 7830 is where something went wrong, and 7831/32 are screwed.
Thanks for any help you can give me!!