Major Errors

I purchased my fantom g6 new about 3 years ago , but due to work I don't have a lot of free time to dedicate to it..About 2 years ago I lost a good amount of information "songs/projects" due to some type of error.. I would just create songs, and save them , not really reviewing immediately what I was saving.. And when I tried to reload the songs I saved from an earlier date, I got some type of strange sounding song that was nothing like what I originally saved.. I actually lost about 20 completed songs in this manner.. I contacted Roland numerous times and was told it was something related to my USB key and not the board...although I was getting numerous error messages as well during this time........At this point I am a little hesitant to do projects on this board b/c of the simple fact that my information might disappear as it had earlier.....

Has anyone had a similar experience.....

Thanks