R02 is an extension specific to files created by a compressed archive management program called WinRAR. R02 is one of the multi-part archive files that was created in the program. The files that make up such an archive are assigned the following extensions R01, R02, R03, etc. This solution allows you to save large amounts of data on several smaller media. The program allows you to define the maximum size of the elements of a multi-file archive.

To properly extract files from this type of archive, the program must be available to all its parts.