I need software that will delete duplicate files

[SAWYER]

I have an external hard drive with several folders that are from a few different pc changes. I need to get rid of duplicate files.

 

[gevorg]

http://www.ultraedit.com/products/ultracompare/new_feature_tour.html

 

[akugami]

http://doubles.sourceforge.net/

Could give this a shot. Open source, so freeware.