The file on the MicroSD card is inserted in the slot on the converter when powered off. After inserting the MicroSD card into the Device and it is powered on you will see a sequence of three flashes: Three green flashes: the YDNG.TXT configuration file has been read and changes have been made to the current Device settings and saved to non-volatile memory. The YDNGSAVE.TXT file on the card has been saved with the updated configuration. Green, red, red: the YDNG.TXT file has been read from the card, but the current configuration of the Device has not been changed (either the configuration file does not differ from the current settings, contains errors or there are no settings in the file). The YDNGSAVE.TXT file on the card has been saved with the current configuration. Three red flashes: the YDNG.TXT was not found on the MicroSD card or the file system is not supported (see section III). You can safely remove the MicroSD card when the flash sequence is finished.