Unfixed-info.bin

Think of it as a "digital pamphlet" or a changelog. When Nintendo releases a new system update, this file is updated to contain information about what has changed. When you open System Settings on your 3DS, the application reads this file to display the current update history, network status, and legal information.

The file is usually marked as hidden and system. If you can see it, you have enabled "Show hidden files, folders, and drives" in File Explorer. Disable that, and it will disappear from view. unfixed-info.bin