Linsh.rar

Choose "Add to archive..." from the context menu. Configure Solid Option:

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

Optional: Select a "Best" compression method for higher compression. Click OK to generate the solid archive. Key Considerations for Solid Archives: Choose "Add to archive

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) ? Here is how to create a solid RAR

Are you trying to create or turn multi-part files (.part1, .part2) into one ?