These "papers" verify that your part02.rar is not corrupted. You can generate these using tools like QuickSFV or HashTab .
This is the text document included by the release group (e.g., ElAmigos, FitGirl, or Razor1911) that contains installation instructions, system requirements, and crack info. You can view these using a standard text editor or a dedicated NFO Viewer. Age of Empires IV v5.0.26139.0.part02.rar
To use this file, you must have all parts (part01, part02, etc.) in the same folder. Right-click part01.rar and select "Extract Here" using WinRAR or 7-Zip . These "papers" verify that your part02
When users ask for "paper" regarding game files, they usually need one of the following: or Razor1911) that contains installation instructions