Stay away from this NAS

Delivery was very quick.
NAS connected to quick start - and .... nothing.
Exchange in a new device without any problems.
NAS is connected and it worked !!!! Until the next day. Then could not access it you. LED flashed only perk to himself. Restart did not help. 20 minutes from power did not help. Thanks to Google, I could NAS reset (remove from power, keep small button pressed back, power back off, LED flashes red release button, then immediately press again briefly button).
After that I was able to access again, rausholen my data from the Restore folder back and fortunes of this terrible device again.
However, I was again taken off 10% of the purchase price as a few fingerprints on the case were. Had indeed can simply wipe away.
Well, I've ne brought 2TB disk and activate the NAS on my Fritzbox that goes at least without problems.