Everytime I save my game in red and turn it off it says :the file data wad desttroyed? what happend to my red,

No one really can help in this kind of situations, because it differs from case to case. What you can do is see if your cartridge is dirty, scratched, or damaged in any way. Insert and re-insert the cartridge a few times. That's what I do usually, whenever there's a problem with my GameBoy games, but it never seems to help