The SD card I used was recommended by a reputable store. Just to be sure, I went to another store and they recommended the same card. I have only used this card in my Sony handycam camera. This error has occurred and the card is only a week old. I have been capturing video on it until the error happened. I have however, been in seaside areas. Could oxidation on the contacts happen so quickly? Or has the error happened because I took the card out whilst in camera mode? It shouldn't be the case because I can take an SD card out in all other devices I have and put it back in without any problem. Please help me. I have my wedding video and many other video from our holiday. I can't lose this video!!