Thanks for the great Backblaze container!
I use Nextcloud on my Unraid server to provide syncing on my family's computers. I wanted to back up the whole Nextcloud folder, but I could not get the D:\ drive to show up in the Backblaze instance even after following the symbolic linking step in the getting started instructions.
I found that the Backblaze docker doesn't include the same user ID or group ID as the Nextcloud docker, which is why I couldn't access the folder in the container.
I manually added container variables USER_ID and GROUP_ID to the Backblaze container settings.
I can access the whole folder structure now!
Maybe consider adding these fields to the Backblaze container template so that it has access to the whole /usr/share structure?