Over time it’s very likely that the average computer user will acquire quite a few duplicate files.  This happens a variety of ways.  Sometimes users will download multiple versions of the same program but don’t realize it.  Other times they will copy photos to send to friends but never remove the copies.  And still other things happen over time.  The best way to combat this is to use a duplicate file finder to help you automatically find and remove these extras.  In some instances you could save quite a bit of hard disk space, freeing up room for more important things.