Try formatting the card (either using your camera menu or a computer).

What has most likely happened is that you have either taken some photos using a different camera, or put some other files on the card which are not visible by your camera (or the software you are using to view/import the photos).

Try formatting the card (either using your camera menu or a computer).

WARNING (just in case) : formatting will destroy all existing data in the card. make sure you have a copy of everything you want from it first.

What has most likely happened is that you have either taken some photos using a different camera, or put some other files on the card which are not visible by your camera (or the software you are using to view/import the photos).

The most (least) obvious cause could be if you used the card in a different camera. Different camera's store their photos in different folders, and depending on how you are viewing the photos it might not be visible to you.

Try formatting the card first :)

Try formatting the card (either using your camera menu or a computer).

What has most likely happened is that you have either taken some photos using a different camera, or put some other files on the card which are not visible by your camera (or the software you are using to view/import the photos).