To "develop a feature" or successfully manage updates for on the Nintendo Switch using NSP files, you generally need to handle the integration of the base game and its update data. 1. Merging Update with Base NSP
If you are looking to combine the base game and the update into a single file for easier installation, you can use tools like (Switch Army Knife). Vampyr Switch NSP [Update]
If you prefer keeping them separate, you can install them directly to your Switch's SD card using managers like or DBI . To "develop a feature" or successfully manage updates
: Highlight the Vampyr icon on the Home Menu, press the + or - button, and select Software Update > Via the Internet [ Nintendo Support ]. If you prefer keeping them separate, you can
: Enable this in System Settings > System > Automatic Software Updates to ensure the game stays current whenever connected to the internet [ Nintendo UK Support ].
: Ensure you have your Nintendo production keys in the tool's bin folder.