Mycloud ex2 Ultra cannot connect

First time use here, I hope this is the correct forum.

I have a Mycloud EX2 Ultra on my home network. It is connected to a switch as are all my PCs and my Cable Modem. Everything has been working fine for years.

Last night I experienced a momentary power outage during a thunderstorm. This morning, I cannot connect to the Mycloud.

If I try to open one of the drive mappings on the Mycloud I get the error:
“An error occurred while reconnecting to \MYCLOUDEX2ULTRA\directory\subdirectory. Microsoft Windows Network: The local device name is already in use. This connection has not be restored.”

I tried going to http://mycloudex2ultra in my web browser (Tried with Chrome, Firefox, and Edge) and I get:

"This site can’t be reached

Check if there is a typo in mycloudex2ultra.
If spelling is correct, try running Windows Network Diagnostics.
DNS_PROBE_FINISHED_NXDOMAIN"

The lights on the switch shows that the Mycloud is connected.

My PC is running Windows 10 Pro, Version 22HP, Build 19045.4780

I am set up for DHCP.

I have tried powering off the mycloud and powering it back on, same problem.

I have tried the 4-second reset, same problem. I have not tried the 40-second reset because I am worried about data loss.

Any help would be greatly appreciated. Thank you.

@WVMontani

You say you have a My Cloud EX2 Ultra, not a My Cloud Home and you are not providing an idea for the My Cloud Home.

Does your device have OS3 or OS5? You need to go back to the community and post under the OS for your device and the sub-forum for your device.

I have no idea what my OS is. I bought it several years ago. When did WD switch from OS3 to OS5?

@WVMontani

It’s been quite a while back. See if this information helps.
Online User Guide and Solutions for My Cloud OS 5 (wd.com)