: This indicates the North American region version of the game.
: This is the file format used to install software directly onto a 3DS home menu. According to Hacks Guide Wiki , CIA files are the preferred format if you want the game to appear as an icon on your main screen rather than running it through a separate launcher. MH3U-USA-CIA-RF-Ziperto.rar
: The .rar file is a container. Users typically use software like 7-Zip or WinRAR to extract the .cia file hidden inside. : This indicates the North American region version
Based on the file tags, here is the "story" of what this file is and how it’s typically used: The Components MH3U-USA-CIA-RF-Ziperto.rar
: On a modded 3DS, the file is usually moved to an SD card and installed using a tool like FBI (a common open-source title manager).