Looking for a software that will scan a folder (and all its sub-folders tree) and will output Folders that have a lot of files in common.

  • Can you define "have a lot of files in common"?
    – Mawg
    Commented Nov 16, 2021 at 22:01

3 Answers 3


You can use Fast Duplicate File Finder to accomplish this if you are looking for duplicate files or duplicate files with different names in multiple directories or the same directory. Files that are similar or a duplicate with a different name will be grouped together with the folders the files are in.

From Widipedia, "Fast Duplicate File Finder is a Windows tool developed by MindGems Inc, available as a freeware version and a full commercial version. It is intended to scan a user's computer for duplicate files, display a list of such files and let the user delete unneeded copies with the purpose of freeing up hard drive space."


  • 1
    A link to the application would improve this answer.
    – Eric S
    Commented Jun 10, 2021 at 12:49

The functionality you require is not clear in your question. However, a program for the Windows OS called WinMerge will display small icons on the folder and file views to indicate differences within folders and files. Useful if you want a visual overview of differences. Plus see the answers in this question and this question which cover the tools Total Commander, Meld, and krusader.


You can simply write a basic script (maybe in PowerShell) that recursively interates into two folders retrieving, for example, filenames, sizes, dates and other attributes. Save such info into a couple of hash tables and diff them with some criteria. Et voilà.

  • 1
    It'll take the script a very very long time to do so - I need it to search thousands of folders. It has to be quit sophisticated
    – WillyCode
    Commented Jul 18, 2021 at 16:30

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