J&m123.7z

You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. 7z Format - 7-Zip 18 Documentation

: Use built-in tools or third-party apps like The Unarchiver to reveal the internal text files. J&M123.7z

While "J&M123" is not a standard system file, similar naming conventions sometimes appear in specific contexts: You can use 7-Zip on any computer, including

Knowing if it is a personal backup, a game mod, or a professional document would help identify its intended "text." a game mod