: If you have multiple files like "I01.rar", "I02.rar", etc., they belong together. You typically need all parts in the same folder to successfully extract the data. 2. How to Open "I04.rar"

: RAR is a proprietary format that bundles multiple files into a single, smaller package for easier sharing or storage.

: The official tool for creating and opening RAR files. It is shareware with a free trial period.

Because RAR is a proprietary format, standard Windows or macOS extractors often cannot open them without third-party software. Recommended Software

: A highly recommended free tool for macOS users. Extraction Steps (Windows)

: A popular, free, and open-source alternative that supports extracting RAR files.