To create a RAR file in Windows 11, download and install WinRAR. Right-click the files or folders you want to compress, select Add to archive, choose RAR as the archive format, and click OK.

Posey's Tips & Tricks How To Fix a Missing File Explorer Shortcut Here's how to restore missing context menu options and file associations in Windows when File Explorer shortcuts By Brien Posey 04 ...

The file extension is not necessarily linked to the format of the file but instead just tells File Explorer how to open and read that particular file using the applications you have installed.