Attaching My Book to My Cloud Home

Is it possible to connect a WD My Book to the WD My Cloud Home via USB? I would like to use the MY Book as a backup to the My Cloud. I have tried to connect, but I am not able to see the My Book either on my laptop or online.

Look at the User Manual.

Note in the manual:

Import content from a USB device to My Cloud Home by following these steps:

  1. Access the My Cloud Home mobile app.