: The official software for creating and opening these files.

: A common choice for Mac users to extract compressed files. Safety and Security Tips

Because Windows and macOS do not always support .rar files natively, you will need a third-party "unarchiver" or "extractor":

: The .rar extension stands for Roshal Archive . It is a proprietary format used to bundle multiple files into a single, smaller package to save storage space and make sharing easier.

: A popular, free, open-source alternative that handles many archive formats.

The filename suggests it is part of a numbered series (e.g., "04") within a larger collection of data.