I have the same problem.
In my case (with Windows 7 x64) this issue begun when I updated from 2.2.0 to 2.3.0.
I could partially reduce the problem by downgrading to 2.2.0 since copying files process does not last more than 5 -10 minutes at the most when using this version.
I am fed up with this software and the time it has made me waste uninstalling and reinstalling again.
Due to the last WD issue (Pro- version activation issue), some days ago I was suggested to upgrade (to **bleep** 2.3.0. again) following WD advisor recommendation. As the result, the issue appeared again and I will have to downgrade for the umpteenth time.
I have never seen so bad software in my entire life. A very kind and responsive Technical Team but not very effective when trying to solve this kind of issue. It seems the solution is always “uninstall and re-install”
A nightmare!!
