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Idle curiosity: is there a reason that some people put RAR files within ZIPS, nesting archives, etc., vice-versa and so forth?
And is there an advantage RAR files have over ZIP files?
RAR generally gets better compression than ZIP. If the purpose is to reduce overall file size then no, you cannot stack RAR/ZIP files in such a way that the file size gets smaller with each compression. In fact, compressing a file that is already compressed will usually result in a larger file size, as the compressed data contains a certain amount of overhead that cannot be compressed further.
Usually one obtained 1-n RAR files and keeping them as-is makes sense.
Not everyone has a WinRAR (even though it seems that last week some individuals bought a license for this shareware https://twitter.com/WinRAR_RARLAB/status/1668595715889659904) so 7zip or something like this is used to create the final archive with a readme or product image.@kayma , better install 7-zip. This can read zip, rar, gzip (gz as the comprompressor from Daz3D.., but hidden: change ".duf" to ".gz" extension..), tar-gz, and more.
https://www.7-zip.org/
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