Good question, camera settings can be tricky because changing too much at once can make the original issue harder to trace. I protect the photos first, then write down the Panasonic model, memory card type, file format showing now, and the last menu settings you remember touching. A couple of sample file names or screen photos can help too. Keep the question about the change in saving behavior, not general camera performance. Then how to contact panasonic points to a clearer request about format settings, card behavior, and safe next steps without risking the pictures.