Find suplicate files that have same content (by matching spaces and char on each rows ?)

[me_suzy]

hello. Supose I have 500 files, and maybe 300 are the same content.
The problem is that the content is always different, can be 3 lines/rows, or an entire text, more than 2000 words.

I don’t know how to do this, but I believe I got to find (maybe with Regex) that rows/lines that has a specific number of characters/numbers, etc, and a specific spaces/blank-spaces.

Can anybody help me?

[me_suzy]

I don’t know regex, but a solution is with TotalCommander. Search (Alt+F7) -> Advanced -> Find duplicate files -> same contents

or you can use DupSelector (Total Commander) - Just copy the .exe on the specific folder and open it. It will automatic select the duplicate file with a color and will keep the original file (unselected) with other color.