If you are worried about your router going down you could always pick up a $30 travel router off newegg, which would essentially make your mycloud wiress. You don’t need an internet connection to access my cloud wirelessly, just a router.
If it’s any consolation, you can at least hook the my cloud directly to your PC with a usb ethernet port as suggested. No need for a router. I was surprise to find this on page 120 of the manual:
My router has failed. How do you manually map the drive letter?
1. Power down the device.
2. Connect the device directly to the computer’s Ethernet port.
I’ve done this & it works fine. Windows “ad hoc” networking make this work, assigning each device an IP address. You can even have the drive connected to your ethernet port while you are connected to the internet via wireless.
I haven’t looked up the numbers, but off the top of my head real world gigabit ethernet will be faster than USB 3.0… at the very least comperable.