Quick question – you were reporting (VERY) Slow speeds in your initial post, but I can’t make heads or tails of what and how you were measuring. :)
7MB/minute is HORRIBLE – even slow compared to “Slow” standards. Yes, the cloud does slow down (sometimes considerably) while indexing / thumbnail generation is going on, but I can’t imagine it slowing down that much.
Not using backup software or whatever, just try an ordinary file copy of a file that’s maybe 100 megabytes or larger.
What kind of throughput do you get then?
Also, if you’re so inclined, you can peruse this:
http://community.wd.com/t5/WD-My-Cloud/HOW-TO-Troubleshoot-NAS-Performance-concerns/td-p/618695