I had a card that was corrupted. I could not get it to format of delete pictures. Chucked it i had bought it for a new camera last year. The first soak only had 30 minutes of pictures. Thought it was the camera. Returned it. When I popped the replacement camera open last week with the same card, no pictures for the 4 months it was out. Looked at the images on my laptop and they were all from the previous camera the year before Several thousand over 8 hours, but they were in multiple folders, that is why I had not seen them before. Don't know if the first camera did in the disc or it was bad from the get go. Both are gone now though.