Before you touch a single file, you need to understand what you are downloading.
Delete the original NSP files from the SD card afterward to reclaim space. Verifying the Installation mario kart 8 deluxe switch nsp update dlc install
Ensure your console has the latest signature patches (SIG patches) to allow the installation and execution of unofficial NSP files. Step-by-Step Installation Order Before you touch a single file, you need
Do not install the DLC before the update. Before you touch a single file
This is the method Nintendo intends for all users. It's the easiest, safest, and fully supported way to keep your game updated and access the Booster Course Pass.