Due to my hard drive being nearly full, I moved the My Music folder (but not iTunes) to an external drive.
Now when I am copying AAC files to this folder after converting them to iTunes, iTunes is not allowing me to play them.
Is it something to do with where the files were originally converted from.

Now when I am copying AAC files to this folder after converting them to iTunes, iTunes is not allowing me to play them.
Is it something to do with where the files were originally converted from.