Start by reading the following thread:
https://community.wd.com/t/before-you-pack-up-your-wd-and-return-it-lets-talk-about-copying-speeds/91887
There are a lot of factors that affect copying speed between one’s computer and the My Cloud. This includes copying a large number of small files versus a single large file. The speed of the drive at both ends can impact the copying speed. The network speed itself may impact the copying speed if the computer NIC port is only 100mb vs 1GB on the My Cloud. For what ever reason others have reported slow copying speed with Mac’s. El Capitan has several issues with the My Cloud. There is a separate El Capitan thread to discuss those issues.
One generally never gets the “advertised” speed of the equipment on the local network.
