In the world of Nintendo Switch game preservation, the NSP (Nintendo Submission Package) format is a digital copy of a game as it would be installed directly from the Nintendo eShop. The file title "The Legend of Zelda Echoes Of Wisdom-NSP-BASE-G..." represents a digital release of the game, specifically the base version (not including update patches or DLC). The file size for this title is approximately 5.6GB for the base game, with some sources listing it as 6GB depending on regional packaging. This file type is used with emulation software or custom firmware to run backup copies of purchased games.
The "NSP" in the keyword stands for . This is the official file format used by Nintendo to distribute digital games, updates, and DLC for the Nintendo Switch via the eShop. You can think of it as a specialized digital container, similar to a .zip file, that holds all the necessary data for a game to run. An NSP file typically includes: The Legend Of Zelda Echoes Of Wisdom-NSP-BASE-G...