My Sony camera just stopped recognizing the memory cards out of nowhere.
I went into despair because I tested other cards that I had and it didn't read AND IT DIDN'T FORMAT in any of the two slots.
Intuitively I saved all my files on the computer, then switched my camera to PAL format and put the camera to format in the first slot. BOOOMM...she formatted it, so I redid the process with slot 2 and formatted it too.
I went back to the format that was NTSC and the camera worked perfectly with the formatted cards.
I hope to help someone with this information around the Sony world!