A "RAR" file (Roshal Archive) is a proprietary data container that holds one or more files in a compressed format. Files with the .rar extension, such as the one you mentioned, are typically used to bundle multiple documents, images, or videos into a single, smaller package for easier sharing and storage. Key Characteristics of RAR Files

Because RAR is a proprietary format, standard operating systems like Windows or macOS often require third-party software to open them. What are RAR Files? - Easynews

Large archives can be split into smaller "volumes" or parts (e.g., .part1.rar , .part2.rar ). All parts must usually be present in the same directory to successfully extract the full content.

They reduce the file size of the contents, which is helpful for saving storage space or reducing download times.