Did you look at the link I provided? First generation has firmware 04.xx.xx and second has 02.xx.xx.
There are a lot of topics about the problem with Windows 10 not showing the My Cloud under Network. It should show as a Media Device and Storage. Have you tried this, \\WDMYCLOUD, in the address bar of File Explorer?
See this prior topic. You will need two slash marks in front of WDMYCLOUD, \\
