Large files (like high-definition videos or software) were often split into multiple small parts (e.g., .part1.rar , .part2.rar ) to stay within the upload limits of free file hosts.
This is a technical term used in the piracy and file-sharing community. A "repack" is a version of a file (usually a game or a high-definition movie) that has been compressed or re-encoded to make the file size smaller without significantly sacrificing quality. The Era of the "One-Click Hoster"
If you are working with older files retrieved from such sources, you may encounter multi-part archives. To manage these: