Yes, I meant temporarily disabling streaming/sharing whilst you’re transferring data. But since you’ve transferred so little, I can’t see that any of my suggestions would be the problem…
4 sec reset does nothing? At all? I’m sure the front panel LED ought t do something, but I’d have to check the manual. You’ve read the user manual, I take it?
I guess it’s time to try the 40 sec system restore reset, and see if that helps. And a router reset.
You’re not the first with connection issues:
http://community.wd.com/t5/WD-My-Cloud/Can-t-access-MyCloud-or-Dashboard/td-p/865957
http://community.wd.com/t5/WD-My-Cloud/Can-t-access-dashboard/td-p/611281
http://community.wd.com/t5/WD-My-Cloud/Auto-network-restart-or-reboot-after-network-loss/td-p/865761
http://community.wd.com/t5/WD-My-Cloud/Ethernet-connections-interruptions-and-restarts/td-p/864698
http://community.wd.com/t5/WD-My-Cloud/Cannot-reconnect-to-My-Cloud/td-p/863984
http://community.wd.com/t5/WD-My-Cloud/Drives-disappears-from-SmartWare-randomly/td-p/864225
And that’s just a few recent threads…