TS1550 My new WD 3tb My Cloud external hard drive can't be seen by Time Machine....

.....though it can be seen  and connected to through Finder, I just get this message when I try to backup -The operation couldn’t be completed. (OSStatus error 2.). 
First back up went fine and a couple after but I had to reconnect the WD drive to reposition it and since then Time Machine has not worked.  I'm fast loosing patience.
Help please.

There is a long history of WD disk enclosures not being as compatible with Macs as other makes.
The Carbon Copy Cloner site has some notes about this. As far as I can tell you are on the wrong forum.
Whilst it may not be your fault I am afraid it appears that your post is on a forum which is not the best for your OS. It will save the time of the unpaid volunteers here, and may resolve your issue faster, if you could examine the list below and see if there is a more appropriate forum to which you could direct your question.
OS X 10.9 Mavericks
OS X 10.8 Mountain Lion
OS X 10.7 Lion
OS X 10.6 Snow Leopard
OS X 10.5 Leopard
OS X 10.4 Tiger
OS X 10.3 and earlier
OS 9, OS 8 & System 7
OS X Technologies
OS X Server
iPad
iPhone
iPod
Other

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