My top level Dropbox folder has switched to online-only without my permission. I took care not to enable this, as I want Dropbox as a backup, not as an extra storage. I want immediate access to my files at all times and not wait for a download.
I discovered this as I was editing 800+ photos of a wedding (!!!!! imagine).
The finder became slow, I could not longer open RAW files in photoshop from the finder. I could not import photos in the photos app. All was very, very slow all of a sudden. Now I can't continue my work, because I will have to wait for days to sync everything back again.
These files are my most precious files (not only those of the wedding, but those that in general mean the most to me).
I have a paid subscription to Dropbox that I will cancel as soon as I have my files back and copied to a safe location and a backup location.
I will remove dropbox from all my devices after this.