To have USB drives detected and be able to be wiped please make sure below settings are set as in this example. It would be easier to boot from a USB.
At the place of <tag filename> you have to define a filename that will de reconized by the software so it will not wipe that stick. If you use the bootable USB stick you can use the wd-options.cfg as tag. If you use another key just create a tag.txt file and use that.
Some additional settings:
If there is anything not working or clear, please reach out to email@example.com to get help.