This morning I rebooted my computer to finish installing a Windows 11 update that downloaded overnight. A short time later when I wanted to look at one of my My Cloud devices nothing was showing under Network. I checked SMB 1.0 and found items that were off. Once I checked their boxes and rebooted my computer, all my devices are showing again. To check for this if you have the same problem type, turn windows features on or off, using the seach icon on the taskbar.
Yep, Windows 11 and later versions of Windows 10 turn off SMB1 by default.