Is the copy speed a different issue than the issue you first posted about at the start of your thread?
How is your computer connected to the network? WiFi or wired Ethernet?
There are numerous reasons that do not involve the My Cloud as why the copy speed might be slow. Start by reading through the following thread:
https://community.wd.com/t/before-you-pack-up-your-wd-and-return-it-lets-talk-about-copying-speeds/91887
Then see this link: http://www.tomshardware.com/reviews/gigabit-ethernet-bandwidth,2321-3.html
And this one: http://www.speedguide.net/faq/what-is-the-actual-real-life-speed-of-wireless-374
The My Cloud User Manual (http://www.wdc.com/wdproducts/library/?id=439&type=25) explains, in Chapter 12 Connecting a USB Hard Drive, what the USB port on the back of the My Cloud is for. Generally it is for expanding the storage of the My Cloud and for backing up the My Cloud to an external USB hard drive.
You cannot connect the My Cloud to a computer by the My Cloud USB port.
Generally to get the fastest copy speed one needs to have and use a Gigabit switched router/gateway and have Gigabit networking port in their computer, and connect that computer via Ethernet wire to the same Gigabit router/gateway the My Cloud is connected too.
