File system analysis software?

[DrZoidberg]

Are there any softwares that can analyze every file and folder in 2 main folders to determine that their contents are identical, and if not determine the exact difference? For example if I were trying to backup a folder, but want to confirm if anything was even changed since the last backup. Perhaps just one added file or something. Or a file became larger or something.

 

[voyagerfan99]

10 Best Duplicate File Finders for Windows 11 and 10 (Free and Paid)

Wondering how to find and remove duplicate files in Windows 11/10? Here is our list of the best duplicate file finders for Windows in 2023.

beebom.com

 

[beers]

Are you just hoping to diff text files or what kinds of comparisons are you looking for?
You can easily do this with standard CLI tools in Linux, or other hashing algorithm against your files. Some of the ones @voyagerfan99 listed do a similar thing under the cover.