not sure why your images in your last post are not showing although the older post is now showing them, they wern’t showing yesterday
I am not sure if you are windows or mac, these steps are for windows, can probably do somthing similer on mac but i can’t help there
in a command prompt type type ipconfig /all
you will see information for 1 or more ethernet adapters, if needed identify the one on the LAN with the mycloud
look for subnet mask, default gatway & DNS servers, be sure these are exact matches for the values in the mycloud settings.
make sure the ip addresses are really on the same network, for a subnet mask of 255.255.255.0 the 1st 3 numbers need to match between the PC & mycloud. the address of the mycloud needs to be unique on the network and outside of the DHCP pool on the router.
if all this checks out see if you can temporarily disable the firewall on your router to see if it is the issue.
you could also try DHCP on the mycloud although some people have reported connections dropping with it. if DHCP works the issue is one of the items I listed above