I'm not talking about viruses but normal clutter. I have so much duplicated data that I'd like to eliminate but don't know if some program may be needing it eventually.

Many, if not all, of my mp3s and pics have multiplied.

I ran a Duplicate File Finder but hesitate to delete anything for fear of botching something important.

I've recently started using a desktop organizer but need a plan or scheme to eliminate the harmless garbage first.

Any suggestions will be appreciated.