Generally when you connect the My Cloud direct to the computer’s Ethernet port you have to configure BOTH the My Cloud and the computer’s Ethernet port to use the same IP address range.
Often a simple 4 second reset or 40 second system restore via the reset button on the back of the My Cloud can fix certain issues with the My Cloud.
http://support.wdc.com/KnowledgeBase/answer.aspx?ID=10432
As to copying speeds. One almost never gets the advertised maximum copying speed across network devices. There are many reasons why this is the case. Start by reading the following thread if you haven’t done so already that attempts to explain some issues with copying speed and some possible workarounds to boost that copy speed.
