Unless WD has had a major improvement I doubt the MC backup now works
Well, you might try the new WD Sync app…
http://support.wdc.com/product.aspx?ID=904&lang=en
I haven’t… I note the download page still says it’s only for Mirror devices and up, but I’m pretty sure I recall the ‘OS3’ puff wibbling on about WD Sync for basic MyCloud. The picture next to the blurb about WD Sync on their “What’s New” page shows a basic MyCloud. But that’s marketing, so may not bear any resemblance to reality…
http://www.wdc.com/en/whats-new/
You might also find inspiration from this thread: