Some cameras get funny when you start putting cards in that have been in other cams. We had the same issue when using a Wildgame and a Moultrie camera, they often didn't write to when in the Wildgame after it had been in a Moultrie. For a long time it didn't matter. Same thing started happening with some of our Coverts, after the cards had been in other Coverts. The problem there started after a couple cams got sent in under warranty and they sent out newer cameras. Like Jesse and others have said, reformat the cards every time and they should work fine. I always do a quick reformat on my laptop after I copy the pictures over. I've tried doing it on the cameras before and often times it did not work and would not write pics after.
