Hi!
First post, loving nextcoud so far. Coming from pydio.
Question: On 18.0.4, we have defined some external storages, and we would like to add a tag to each one, to use in the Flow app, to allow only one specific external storage in the nextcloud sync app, and keep the others web-interface only.
It seems we can add Tags to files and folders, but not to each top level ‘external storages’ folder.
Is there a way to do this? (or another way to achieve the same result…?)
Thanks!
ok, to bad… no replies … 
What I have done now is more bute force: I am using AD group memberships as a condition to create or not-create external storages. Meaning, some will be completely unavailable, both in the app and the web interface.
It would be nice to be able to restrict some external storages to webinterface-only, while having others available both in the sync clients and the webinterface.
If someone has an idea how to achieve this, please do let me know. 
For now, we’ve become happy nextloud users! Thanks for it!