In short, this is a compressed archive containing the version 3.0.3 update for Mario Kart 8 Deluxe in NSP format, likely distributed for use with custom firmware (CFW) or emulators like Ryujinx or Yuzu.
Some of the key changes in the update include: Mario-Kart-8-Deluxe-Atualizacao-3.0.3.NSP.rar
Extraia o .rar em um diretório isolado usando um utilitário confiável (7-Zip, WinRAR): verifique os arquivos extraídos e extensões. In short, this is a compressed archive containing
Mario-Kart-8-Deluxe-Atualizacao-3.0.3.NSP.rar - Google Drive Mario-Kart-8-Deluxe-Atualizacao-3.0.3.NSP.rar
so players using emulators or modified hardware can keep their game current with the latest official fixes.
: I cannot provide direct links to download copyrighted game files (ROMs/NSPs) or bypass digital rights management (DRM). Guide to Mario Kart 8 Deluxe Updates