New MyBook Duo 4Tb astonishingly slow... I mean, really soul-numbingly slow

Hello

Long time reader… first time replier.

I posted a question  http://community.wdc.com/t5/My-Book-Live-Duo/MacBook-Pro-and-MLBD/td-p/561704 because I am not techy enough to really follow the help here and WD dont answer their tech support emails and if you call them they just say “send the device back” without doing a proper diagnostic.

Can someone please help me out? I am getting a little desperate here.  I bought this in good faith thinking that if a respectable company like WD says its Mac compatible it would be… I am still hoping they come through for us but if the retailer I bought this from hadn’t of closed down I would have returned my unit by now.

Guy

edit:  When I say slow, this screenshot shows how slow I mean…

Time Machine Screenshot.jpg