I would like to import all my songs into iTunes from an external drive making a copy of all my songs (only one copy no duplicates) onto my main Harddrive internal. then I would like to delete the songs off my external. my problem is that currently in iTunes it sees several duplicates of almost all the songs. I would like a fresh library and only one copy of all my songs. will a fresh import solve this for me? how do i trash an old library?