File Error report on a W80 camera....
I had the same problem.
First, I changed my Memory-Stick, because after taking about 60 pictures the famous file error appeared.
Secondly, if the camera shows the famous "file error" this can be resolved - at least in my case - by taking out the battery for at least 4 hours.
So, if your camera is not in use, always take out the memory-stick and the battery and the problem does not appear. This helped in my case.
However, this is in my opinion anything but satisfying. I had a Nikon Coolpix nd never experienced any problems like the "file error" of the sony digicams.