To update on the Nintendo Switch using an NSP file, you must have a console running custom firmware (CFW) such as Atmosphere . As of April 18, 2026 , the latest version for the Switch is Ver. 1.39.5 . 1. Preparation
For those looking for "NSP" files (Nintendo Submission Packages), ensure you are updating your software through the Nintendo eShop astroneer switch nsp update
Implications for Astroneer’s Switch lifespan To update on the Nintendo Switch using an