How do you delete all traces of illegal downloading on files like songs?

the college im going to scans each pc that uses their WiFi and LAN networks for traces of illegal downloading in files like songs, movies, etc. I have 7000 songs and about 50 movies so transfering them to CDs isnt really feasible and if i get 3 strikes for having files of illegal nature on my computer then i lose my online priveledge. so is there a way to rearrange my songs or to change the catalog and its origin to make it so the scan doesn't pick them up??