Choose "Add to archive..." from the context menu. Configure Solid Option:
If you provide this info, I can tell you if you should be using the rar command-line tool or if a simple right-click in Windows will do the trick. rar - ArchWiki
To create a "solid" piece (or a solid archive) from your Linsh.rar data, you are essentially treating all compressed files as a single data block to increase compression efficiency. This is best achieved using on Windows, as solid mode is a native RAR feature. Here is how to create a solid RAR file: Linsh.rar
Many small, similar files, as it treats them as a single stream to boost compression.
In the "General" tab, set to RAR (Solid mode only works with RAR, not ZIP). Check the box for "Create solid archive" . Choose "Add to archive
Right-click the folder or files you want to archive.
Adding or extracting single files from a solid archive takes much longer because the entire archive must be processed. This is best achieved using on Windows, as
7-Zip also supports solid compression using the .7z format. To make sure I'm giving you the best approach, let me know: Are you using Windows (WinRAR) or Linux (terminal) ?