An electronic device includes a storage unit that stores configuration data related to the electronic device, a configuration data writing unit that writes configuration data from the storage unit to the external storage device when electronic device power turns off, a configuration data updating unit that, after the configuration data is written to the external storage device, executes a deletion process to delete the configuration data in the storage unit, or an initialization process that resets the configuration data in the storage unit to a default initialization value, a configuration data reading unit that reads the configuration data from the external storage device when electronic device power turns on, a configuration unit that configures the electronic device based on the read configuration data, and a configuration data deletion unit that deletes the configuration data stored in the external storage device after the configuration unit completes configuring the electronic device.