Question about WD My Book Duo

I am not aware of this. First check the voltage and current of the WD my Book Duo (16TB).
(this should be written in the manual or on the power supply).
Then I would see if there is an adjustable power supply unit (not a lab unit, too expensive).
I had the same problem with another product and was able to solve it with an adjustable one.
At the competitor Media Markt Basel ;-)

Otherwise, here is the link, https://www.amazon.de/Western-Di...

I hope this helps you.