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• Format SD-card – this action will erase all data on external microSD-card • Backup configuration to SD – this action will create a backup folder on an external microSDcard and will save there system settings. You will be suggested to enter the file name from on-screen keyboard • Restore configuration – select the configuration file to restore from a list • Clean state – the Device state will be reset to factory default settings, erasing user settings. Other data (e.g. books, photos) won’t be lost • Update interval – set the interval to check for updates automatically • Calibrate touch panel – touch crosses appearing on a screen • Remove ADE authorization.