You cannot access the My Cloud using USB.Sometimes one can access the My Cloud Dashboard (http://wdmycloud) through the My Cloud IP address. Because you reinstalled Windows 10 the default Windows 10 settings may block access to local network devices. In particular see Windows 10 Specific Method 1 through Windows 10 Specific Method 5 in the following discussion thread:
https://community.wd.com/t/compilation-of-windows-10-methods-steps-and-solutions/142576
