: Open WinRAR and select the files you wish to compress.

If you are the one creating the post and want to split your files into multiple parts including a "Part05":

: In the "Archive name and parameters" window, look for the "Split to volumes, size" field at the bottom left.

: Enter the maximum size for each part (e.g., "100 MB" or "1 GB"). WinRAR will automatically create as many parts as needed (Part 01, Part 02, etc.) based on the total file size. Complete : Click OK to begin the compression process.