Extension.rar

: It can split large data sets into multiple smaller files (e.g., .r00 , .r01 ) for easier transfer across limited storage media.

: Registered versions can embed creator information and update times to verify the source of the archive. How to Open RAR Files

: It features robust password protection and security options to protect the contents.

Because it is a proprietary format, standard operating systems often lack full native support, though recently added limited built-in extraction.