Finding Differences among Folders of Similar Files

Situation:

Someone has copied a section of file folders to another place and then edited some there and some in the original place.

How to tell differences?

Solution:

First create a file listing using Tree  for each area
   Tree /a /f  >c:\files.txt
    note: put wherever you like, perhaps the desktop

Then use Winmerge
  compare the listing of files to see what is what, what is newer

For further help
Run Winmerge on the original folder and the alternate folder
  Note: for 100G of content, can take 1 hour, as it compares byte by byte.

Use winmerge to copy from alternate area back to original area, but please watch the arrows they use, and be conservative/careful as right click may be best (not the arrows up top in the menu header)