Because this is a "part" file, you cannot use it on its own. You must follow these steps to access the actual game file:
: You must have all segments (part1, part2, part3, etc.) in the same folder. If any parts are missing, the extraction will fail. M&S-ATOG2020-RF-NSwTcH-NSP-ZIPERTO.part2.rar
: Once you have the final .nsp file, it is typically installed on a modded Switch using homebrew applications such as Goldleaf or DBI . Because this is a "part" file, you cannot use it on its own
: Use a tool like WinRAR or 7-Zip to extract "part1". The software will automatically pull data from part2 and all subsequent parts to create one single .nsp file. : Once you have the final
: Sometimes, large games are split into multiple .nsp files after extraction. In these cases, tools like the Switch Merge Utility on GitHub are used to merge them into a single playable file.