In the Switch modding scene, stands for Nintendo Submission Package . It is the installable format for eShop games.
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This update includes the "Road to Glory" and "Porsche of Legends" seasons. asphalt 9 legends switch nsp dlc update eshop upd
If you want to mod your save file, you still need to download the legitimate game via eShop first, then dump your own NSP. Never trust random uploads. In the Switch modding scene, stands for Nintendo