If the text files contain data like columns or lists, you can combine them in or Google Sheets :

This directs the contents of all text files into a single merged.txt file.

To put together text files extracted from "55744.rar," you can use simple command-line tools or manual methods depending on your operating system. This is the fastest way to merge many files at once. Extract the .rar file to a specific folder.

Open a new, blank document in (Windows) or TextEdit (Mac).