At first I did not want to believe my backup stopped there - I suspected the problem elsewhere. In a random conversation with a service technician who saw the unit with me, I learned that his identical panel turns off repeatedly with no apparent reasons. After disconnecting and reconnecting the USB connection the device has been resumed.
When researching the WWW I noticed on other similar comments. Accordingly you should think carefully about whether this device is used for data backup - in my opinion, separates a not 100% reliable medium for such purposes in general from.
Otherwise, the drive is pleasantly quiet in operation and has a good data throughput.