Dropbox integration

I am trying to integrate Dropbox into my Nextcloud. I found the article at External Storage backend for Dropbox - Apps - App Store - Nextcloud and tried to do so.
The fourth dot tells me:
Under the section OAuth2 Redirect URIs add a new URL For adding global storages

I can find “Redirect URI”, but I can’t find neither global storages nor user storages.

Help is very appreciated.

Best regards,

That is on the Dropbox side of things. You have to create an Oauth app that will allow you access from Nextcloud before you do anything in Nextcloud. Any trouble you run into should be asked to Dropbox people; be sure to let us, and the app dev, know if you resolve any issues.