Nintendo Backup Codes are a series of codes used to back up saves for Nintendo Switch games. The codes are typically 12 characters long, and are used to back up saves for both physical and digital games. They can also be used to restore saves that have been lost or deleted.
However, in early 2019, it was reported that a number of users had lost their Nintendo Backup Codes, apparently due to a system update from Nintendo. It was not …
