These are digital installation packages, identical to what you would download from the Nintendo eShop .
Emulators like Yuzu and Ryujinx are highly optimized for loading NSP files.
Because NSPs are designed for digital distribution, they contain only the necessary game data. This can save significant space on your microSD card compared to an untrimmed XCI. 2. Faster Loading Times
Physical cartridges (XCI) are manufactured in fixed sizes (e.g., 8GB, 16GB). If a game is smaller than the cartridge size, the remaining space is filled with "padding" or "garbage" data.
One of the biggest reasons users prefer the NSP format for Super Mario Odyssey is its smaller footprint.
These are direct "dumps" or clones of a physical game cartridge. 1. Superior Storage Efficiency
To understand why "Super Mario Odyssey NSP" might be better for your setup, it is important to know what these files actually are: