: The .rar extension indicates that the original NSP update has been compressed into an archive to reduce its file size for easier sharing and storage. You must extract this file using software like WinRAR or 7-Zip before it can be used. What’s New in Update 1.0.1?
, this update was mandatory for accessing the game's internet features. Official Patch Notes Everybody 1-2-Switch- -NSP--Update 1.0.1-.rar