Not sure why you replied so later on ttansey?
But this unit does not turn on at all, nothing! no leds on, (usually when power is on the rear leds are on) & absolutely no sign of any damage inside. It has nothing to do with the drives. I tried everything I could, change internal battery, take out ram, get new AC charger etc.
WD support is bad, they just stopped responding & I gave up. After this experience I will no longer get another WD NAS ever again, they are too complicated & not reliable.
Back to basic USB HDD or SSD.