: This likely refers to the version number of the update. In software development, version numbers are used to track changes, with each number representing a major, minor, and patch version, respectively.
If you found the 3.0.3.rar file online, — it’s not safe or legitimate. Mario-Kart-8-Deluxe-Atualizacao-3.0.3.NSP.rar
In P2P systems like BitTorrent, files are broken down into smaller segments called . : This likely refers to the version number of the update
: This is Portuguese for "update." This suggests that the file is an update for the game. with each number representing a major