Do you need help with or identifying a specific installer tool for your Switch?

: You must extract the .rar file to get the .nsp file.

: On a modified Switch, users often use tools like Tinfoil or DBI to install the file from an SD card to the console.

How to Install NSP Files from SD card to the Nintendo Switch using Tinfoil!!!

: A compressed archive format that requires software like 7-Zip or WinRAR to extract the actual .nsp file. Usage and Installation

: Likely a shortened title for the game Paper Mario: The Thousand-Year Door (specifically the 2024 remake for Nintendo Switch).

: The name of the website/source where the file originated.