For official updates without risk of a ban, it is recommended to use the standard Nintendo Support guide to update via the internet directly on your console.
: Ensure you have the Base Game installed first. Updates cannot be installed without the original game files. Installation Methods : MGSRUSH-NSwTcH-NSP-Update400-Ziperto.rar
: Use a utility like 7-Zip or WinRAR to extract the .nsp file from the .rar archive. For official updates without risk of a ban,