Using 'Grand Perspective' to see my files, I have both iTunes media and iTunes music files. It seems I have 'organised' my media, but should or need there still be both types of files? I am running out of HD space and thought, maybe, 'merging' .

I'm trying to free up disk space. When I look at my files using 'Grand Perspective' (Like 'Disk Inventory X'), I see songs in both iTunes music and iTunes media files. I'm wonder if there is some kind of duplication between them. Could I find HD space by doing something with these files? I've already 'organised' them using the iTunes library feature. But I note that it seems that organizing could leave the old (?) files in their 'original place'. That sounds to me like duplication.

I'm not at all a 'techie' so don't know where to go from here.

Henry