I have the My Book 2 TB and My Book DUO 6TB. Both were accessible on 7/10/2012 when I activated my new 6TB drive system. The update to WD2GO 2.0 killed that. I am not able to use any of the code keys provided by either system.
I went to the Google app store and downloaded WD2GO Pro and I am back on line.
This is **bleep** when something is working just fine and the vendor goes and screws it up.
My systems have the latest firmware. This is the fault of the vendor providing the upgrade.
I really love my systems when they work, so STOP #$%%^^$$ them.