Is there some kind of "ignore file" feature

I want something like a .gitignore file i can put in a folder, which excludes some if the files in the folder form the sync. Is there such a feature?
I do NOT want to configure the clients (there are multiple in use) but a more centralized solution.

I’m not aware of such a feature, but you can exclude individual folders from being synced to the client.

hmm too sad. i do explicitly not want to configure every client and every possible path :wink: but simply put a file file in the folder and done. comparable to a gitignore file or a nomedia

You can use https://apps.nextcloud.com/apps/files_accesscontrol and Tag your Files/Folders.