Thanks in part to this thread, I was able to get btsync installed and running on my WD My Cloud Mirror 8TB. I set up one synchronized folder as a test, and also tested the camera roll backup from the Btsync iOS client. It worked great for a couple days, but then randomly btsync stopped running. The webserver (port 8888) wasn't responding, and when logging in via SSH I could verify that btsync was no longer in /usr/bin where I had placed it, and my /etc/init.d/btsync was also no longer there. Thinking it was a glitch, I reinstalled, set up my folders again, and all was good for another day