For new people like me… this was not intuitive at all and a lot of refreshed, restarts to get it working.
Install the Repo
Restart HA
Force web page refresh (CTRL-F5 for windows users)
Go into Integrations and click to add new
find HA Data and add it
Download it
Restart HA
Took me a few extra steps as the Repo shows it added at first, then after reboot it was gone. Doublecheck that the Repo is there after reboot.
the dev team could definitely make this WAY easier, too many hoops to get HACS installed and then add repos, etc.
I have found you can move multiple devices to an area using the devices tab in the Devices and Services section of the settings page.
Click Settings > Devices & Services > Devices
then click the selection mode button (to the left of the Search field).
This will show the checkboxes next to each device and open a new header bar showing how many items you have selected, and the option to Add Label to all of them, or “Move to area”.
Here’s a screengrab showing the select options button, and the resulting header with controls:
Take make things easier, use the Group By option easily get to the unassigned devices.
Be careful. The checkboxes do not reset after you’ve assigned the devices to an area, so be sure to “unselect all” between updates if you’re moving a lot of things around.