The .xci file was a neat image of a cartridge: big, self-contained. Ari imagined it like a library in a book—everything bundled together. The .nsp file felt different: modular, like puzzle pieces that could be installed and combined. And the upd file? A tiny patch, a whisper of extra features or fixes that could smooth the way for newer firmware.
A 64GB card is enough for the base game (10GB), update (1GB), save data (2MB), and a few other titles. For a modded library, 256GB+ is recommended. pokemon lets go pikachu switch nsp xci upd work
Open your preferred loader (like TinWoo’s XCI mount feature or the legacy Tinfoil mount). Select the XCI to "mount" as a virtual cartridge. save data (2MB)