I have a Moultrie Digital Trail Camera that I'm always swapping out the SD cards and viewing them in my Kodak Digital Camera.Try checking the LH side of the SD card where there is a small knotch/slide that shows [> Lock] it could be pushed over into the Locked position and causing your problems?Some times the slide can break off and you'll have to put some clear tape over the spot...kinda like the little tab on a VCR tape to keep from erasing what was taped on it.I have nocticed when I try to view pictures from my Trail Camera on my Kodak Camera the pictures won't "ZOOM" in on the camera...and as a side note some times the Moultrie Camera will show "SD Card Locked" and you have to remove the card to see if the slide knotch has moved to "LOCK" positionand re-insert it or blow off the card and the inside on the trail camera where you insert it because of light dust causing the problem?