i love garageband but my files disappeared – GarageBand Review

i use garageband everyday i make music for my friends with it and for myself. i had thousands of tracks i spent countless hours on and i tried to update the app today. after i did all my favorite tracks were gone. i don’t know what to do or how to fix this and i’m debating on giving up after this. is there a fix?
Review by ecstvsy on GarageBand.