Look for the "Split to volumes, size" box at the bottom left.

If you are writing a story about this, focus on the extraction process . Describe the tension as the progress bar slowly fills and the unsettling nature of the files found inside (e.g., photos of a room that look like the reader's own). Technical Guide: Generating Large Multipart RARs

If your goal is literal—generating a long/large archive from your own files—you should use to create a multipart (split) archive . This "splits" one large file into many smaller pieces (like part1.rar , part2.rar ).

Select the "Add to archive..." option from the WinRAR menu.

These tutorials provide step-by-step visual instructions on how to split large files into multiple parts using WinRAR: