There is one thing you should keep in mind: If your card was formatted at a pre-4.5 OS release, and your new device is 4.5 or above, you very well may need to reformat it. There are some issues causing problems originating with the media cards formatted on pre 4.5 devices. I believe the thumbnail file built by the berry has a problem.
You should connect your device to your PC and enable mass storage. Then copy off all data to your PC. You should then be able to reformat the card and copy your data back
** Note: Do not copy the thumbnail files back, as those may continue to give you grief. Those will be rebuilt when the pictures are viewed again.
Treat your password like your toothbrush. Don't let anybody else use it, and get a new one every six months.