The extraction will result in one or more .nsp files, which are the actual Switch-readable packages. :
: Copy the extracted .nsp files into a folder (e.g., /NSPs/ ) on your Switch’s SD card.
: Use DBI or Awoo Installer to install directly from your PC via a USB-C cable to avoid removing the SD card. Install the DLC :
Once installed, the DLC items are not immediately available; you must progress through the story to unlock them.