WD My Cloud kills network when transferring files to it

[Bennor]

What is the computer OS?
How is the network configured? What is connected to what?
If connected via WiFi what make or model is the WiFi adapter?

Some prior threads that may be of interest or relevent.

https://community.wd.com/t/file-transfer-kills-wireless-connection/94482

https://community.wd.com/t/copying-files-to-my-cloud-kills-my-internet-connection-and-why-isnt-my-music-indexed-correctly/93817

https://community.wd.com/t/wd-my-cloud-disconnects-from-network/93083