SSID password (Default = last 8 characters of the device's serial number).(xxxxxx = last 6 characters of the device's MAC addresses).SSID of the device (Default name = My Passport (2.4 GHz) - xxxxxx, and My Passport (5 GHz) - xxxxxx).Admin Password (No password by default).
According to WD's site, a 'System Only Restore' would reset the following settings: This process should not be data destructive and won't harm any data on the device. Would recommend looking up on how to do a 'system only restore' on your specific device if there are no other password recovery options available to you.