Do not try to launch an NSZ file directly from a file manager on a modded Switch. The Switch cannot read NSZ natively; the file must be installed via a homebrew installer that understands the format.
: May require decompression or specific installers like Tinfoil to be usable on hardware or certain emulators. Choosing the Right Format Compatibility XCI Mimicking physical cartridges; "all-in-one" updates. High (Hardware & Emulators) NSP Standard digital installs. High (Hardware & Emulators) NSZ Long-term storage and saving SD card space. Medium (Requires compatible installers) Conversion and Management super mario odyssey xci nsz