The most recent version of Sonic Forces on Nintendo Switch (v1.0.1 and later) includes several core updates and quality-of-life improvements:
: This free prequel story features Shadow the Hedgehog as a playable character, exploring the origins of the villain Infinite across three updated stages and 10+ Modern Sonic levels. Super Sonic DLC
If you are managing files for a modded system or emulator, here is how the technical side generally works: Nintendo Switch NSP Combination Install Tutorial