Assuming you are running a modern CFW (Atmosphere 1.5.0+, sigpatches updated), follow this guide to correctly apply the crash team racing nitrofueled switch nsp upd:
With the final UPD installed, the modding community has created incredible additions: crash team racing nitrofueled switch nsp upd
To install mods, use LayeredFS (create /atmosphere/contents/0100F9E00C0F6000/romfs/). Assuming you are running a modern CFW (Atmosphere 1
Article ID: CTRNF-SW-NSP-2025
Target Platform: Nintendo Switch (Custom Firmware / Atmosphere)
Keyword Focus: crash team racing nitrofueled switch nsp upd Without the base game, update files (UPDs) are useless
In the Switch homebrew and backup scene, NSP is the standard format for digital games. Unlike XCI (which are cartridge dumps), an NSP is identical to the file downloaded directly from the Nintendo eShop. For Crash Team Racing Nitro-Fueled, the base NSP is required before any updates can be applied.
Without the base game, update files (UPDs) are useless. The base NSP contains the core engine, tracks, and character models from the initial launch version (1.0.0).