I recently replace my 2TB WDMC with a 3TB WDMC. In doing that I needed to get the data off of the 2TB.
I found this to be incredibly difficult.
I would advice everyone to try and do it, if you haven’t already, because if the day comes and you need to it may be harder than you think.
I tried moving data directly from the 2TB to the 3TB, moving data to a HDD on my desktop. Moving data to a USB drive connected to my desktop, to a USB MYBOOK connected to the 3TB … man, the calculated times were in the days, like 14 days.
I finally moved folders from the various shares manually.
I then tried to delete the data on the 2TB … again a VERY slow process, so I reset to factory defaults. It seemed to run for 3 days. I unplugged the 2TB and restarted and it did come back to life.
Practice before you need to do something.