If your goal is simply to back up your Pokémon or move them between games on a modified Switch without paying for a HOME subscription, you do not need a dangerous NSP file. The homebrew community has created incredibly powerful, safe, and offline alternatives. PKHeX (PC Editor)
Pokémon HOME Switch NSP Update: The Ultimate Guide to Modding and Installation Pokemon Home Switch NSP UPDATE
(released April 2, 2026), primarily to integrate support for the latest titles and system features. Key Update Highlights (Version 4.0.0) Game Compatibility : Added support for Pokémon Legends: Z-A and the new Pokémon Champions Language Support If your goal is simply to back up
Are you trying to (like "Software update is required")? Key Update Highlights (Version 4
When transferring a Pokémon from an older game (e.g., Sword/Shield ) into Scarlet/Violet , the update recalculates movesets. If a move doesn't exist in Gen 9, it is removed. The "NSP update" contains these local database changes.