Do you know about digital cameras?

Um, try right clicking on the card in My Computer. Click properties. Look at the used and free space. If there is still a lot of used space on the card then your pics are still there. Just hidden. Try that and let me know what happens.

That sucks. It's rare that stuff like that happens too.

What you probably need to do is format you SD card. Take it out of your computer, turn the system on, and the put it in. You should see the drive pop up for it, or even a menu that will ask you to repair it (depending on which version of Windows that you use).

Go to "My Computer" and find the drive ("E", "F", etc) right click. That should give you an options for properties, and somewhere in there you should see an option to format the drive.

You may also be able to format it through your camera in the menu/settings area.

That should clear up the problem. If you still have the pictures on you computer, then you could transfer them back to the card.

Hope this helps.

ummm the only thing I could think of trying is checking on the computer. go throught documents that it would make sense for them to be in and look through hidden files within them. and if you absolutely cannot get them back in any way then to make it so you have memory again you have to reformat your card, which is done by:

1. putting the card in the computer
2. opening My Computer
3. right clicking on the drive where the card is in
4. and then find reformat on that little drop list.

srry I don't know much about cameras but that's just a general idea that I would have and a good thing to try. lemme know what happens =)
also that little pointless guide, is for PCs. I don't know much about macs lol

And now I finally answered one of yours instead =P