If the files are too large, you can select a "Split to volumes, size" option (e.g., 1GB) to create a multi-part archive ( B&GS.part1.rar , B&GS.part2.rar ).
WinRAR will prompt you to confirm adding the files to the archive. Tips for Better Archives B&GS.rar
In the WinRAR "Add to archive" menu, check "Create solid archive" for better compression, particularly if the files are similar. If the files are too large, you can
Are you creating a archive, or adding to an existing one? If the files are too large