Smart Sync is available for Dropbox Professional customers, and members of Dropbox Business teams.
Access every file and folder in your Dropbox account from your computer, using virtually no hard drive space. Smart Sync is a Dropbox feature that helps you save space on your hard drive. If you’re a Dropbox Business team admin, you can enable Smart Sync and get started. If you’re a Dropbox Professional customer, the feature is available by default. This guide discusses a feature that is available to all Dropbox Professional customers.