I have synced both my Desktop and Documents folders on my iCloud. iCloud is now full and I no longer would like to keep them in sync. According to this page (section called How to stop syncing Desktop and Documents Folder to iCloud Drive in macOS Sierra) you just have to uncheck the Desktop & Documents Folders in iCloud settings. When I do so, I get the following warning:
But what I aim to do is the opposite. I would like to keep the files on my current Macbook and unsync from my iCloud to free up space there.
When I manually navigate to my iCloud via Finder and remove the folders, the original files are removed with them. This is slightly confusing.
I just want to unsync the folders from the cloud. It's very straightforward in Dropbox.