Agreed, perhaps look in to using a nextcloud service too e.g Disroot, for some of your documents saved to the cloud, which is still useful if you are on the move, want to share between devices or want to share with colleagues.
With the nextcloud client here, it saves to a local folder which syncs to the remote server, and other devices connected. So you are NOT saving diskspace as such, but anything saved in that linked folder is synced. If that makes sense, same goes for items deleted.