Painfully slow internet when MBLD connected - solved?

I’m using the 6TB Duo connected to my router, with the main computer on the network being a recentish iMac. Every since I connected the MBLD, my internet connection has slumped from about 12Mbps to… 0.6Mbps. I see various people at this board have had similar problems, but not all threads reach a conclusion. One thread (closed, I think, but at http://community.wdc.com/t5/My-Book-Live-Duo/After-update-Internet-failing-when-MBLD-is-connected-and-no/m-p/347209, had the answer for me: turn off the DLNA media server. That means no streaming - but that’s better than no internet. I’ve put this thread here to try and help other people searching with the same problem.

simple…

are you using your Mac over WIFI?