Camera will only let me take 12 pictures
Don't know what camera you have, or whether you have a memory card installed, but "generically" this sounds like an internal memory storage setting (putting all photos to internal memory only).
Pull up the menu screen and look for an option "image storage". Some cameras list "auto" and "internal", others list "card" and "internal".
If you set it to auto, it will try to write to a card, if installed, or will next write to internal memory (which is often pitifully small - 12 images in your case).
It might also be worth checking the card has been inserted correctly, and has been formatted for your camera. (Don't forget to copy off all valuable images before attempting any FORMAT operations you are not confident about).
(Please be more specific in camera make and model, plus card type if you need more specific instructions).
Regards
×