FILE FORMAT ERROR

I HAVE A SONY MAVICA FD200. I BOUGHT IT NEW ABOUT 2 YEARS AGO AND HAVE NEVER HAD A PEEP OF TROUBLE FROM IT. WE WENT ON VACATION TO CANADA EARLIER THIS MONTH, AND I HAVE ONE DISK WHICH GETS THE C:13:01 FILE FORMAT ERROR MESSAGE. I HAVE USED THE CAMERA SINCE WITHOUT ANY PROBLEMS. IS THE PROBLEM JUST WITH THIS ONE DISK? CAN I RECOVER MY PHOTOS? IF SO, HOW? I HATE TO LOSE ANY OF THESE PHOTOS. THANKS FOR ANY HELP.

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