Using Easy Duplicate Finder you'll be able to find all those duplicate files and decide which one to erase. It's not only once that we have the same file stored in two different folders, and that's a waste of space you don't desire.
Easy Duplicate Finder works really fast and accurately. Just follow two simple steps and you'll have a list of duplicate files. Then delete the ones you don't want and enjoy some Mbs or Gbs, what will mean also a better performance of your PC.
If your HD is next to full and emptying the recycled bin hasn't been an effective method, Easy Duplicate Finder can be the final solution.