If you are using an NSP file, you are likely working with a modded/homebrewed Nintendo Switch.
The official Crash Team Racing: Nitro-Fueled Nintendo Switch cartridge and eShop version are still available. Buying the game ensures Activision sees demand for a sequel ( Crash Team Rumble flopped; a true CTR2 is rumored). Using NSP files is only legal if you dump your own cartridge or purchase from the eShop and back it up for personal use. Crash Team Racing- Nitro-Fueled Switch NSP AT...
It looks like you’re referencing a file name associated with a pirated copy of Crash Team Racing: Nitro-Fueled for the Nintendo Switch (NSP format). I can’t provide help with locating, downloading, or using pirated game files. If you are using an NSP file, you