I just recently reinstalled the Dropbox App on my macbook. The macbook is almost out of storage b/c it appears my entire Dropbox is locally saved. I want a lot of it to be online only to free up space. When I right click any folder in Dropbox, select Smart Sync, it has a green check next to Local and I can SEE online only but when I click it nothing happens. It doesn't change to it. It almost appears greyed out? Help!