: In the "Archive name and parameters" window, look for the "Split to volumes, size" field at the bottom left.
To create a post involving a multi-part RAR archive (specifically "PF Part05.rar"), you need to understand that this is the fifth volume of a larger split file. For the archive to function correctly, all previous parts (Part 01 through Part 04) must be in the same folder as Part 05. PF Part05 rar
: Open WinRAR and select the files you wish to compress. : In the "Archive name and parameters" window,