This is the standard file format for Nintendo Switch digital software. It stands for Nintendo Submission Package.
This signifies the specific patch level. To play online, your game version must match this number. Mario Kart 8 Deluxe -NSP--CH--Update 3.0.3-.rar
Open the .rar archive to find the .nsp update file. This is the standard file format for Nintendo
This typically indicates a specific regional build, often the Chinese version (distributed by Tencent) or a localized translation package. Mario Kart 8 Deluxe -NSP--CH--Update 3.0.3-.rar
This is a compressed archive. You will need a utility like WinRAR or 7-Zip to extract the actual NSP file before it can be used. Implementation and Setup