"Backup & Reset" refers to the process of saving important data and restoring a device to its original settings. Backing up data ensures that files, photos, and applications are saved in case of loss or damage. This can be done using cloud services or external storage devices. Resetting a device removes all personal data and settings, returning it to factory conditions. This is useful for troubleshooting issues or preparing a device for a new user. Both actions help maintain the performance and security of devices like smartphones, tablets, and computers.