i’ve tried to restore default factory becuase of Name Renewal.
first of all i downloaded EMEA recovery iso, then created a bootable 16G USB2 flash disk by powerISO for unlock driver and perform a recovery.
unlock driver show success but seems a process becuase of HDD light, anyway.
after perform a recovery by insert flash disk into usb port and hold recovery button till show “initializing ok / loading recovery”. after a long time show this message: " Recovery Failed "
after start recovery process, the program guide you to remove usb flash disk. but you should insert again at the end of recovery process becuase of XML file which is located in USB flash disk.
i think it’s better to not remove USB flash during recovery process.
even after inisializing Ok , many time will be take to load image from usb to NAS.