Always dump your own cartridge to create an XCI, or dump your own update data to create an NSP. This ensures you are not violating copyright laws and guarantees a virus-free file.
If you are using digital backups, always ensure that your update file (NSP) matches the region of your base game (NSP/XCI). Mismatched regions can lead to "The software was closed because an error occurred" messages upon startup. Conclusion super mario odyssey switch nsp xci mise a jour 2021