Click Selective Sync (Windows and Linux) or Choose folders to sync (Mac). ... Uncheck the boxes of any folders that you don't need on your computer's hard drive. They'll still be available in your account on dropbox.com.

Does Dropbox automatically sync?

Cloud file sync is available on multiple devices and platforms, from Windows and Mac to mobile devices like iPhone, iPad and Android via the Dropbox mobile app. Newly saved or updated files are automatically synced everywhere, so you don't have to spend time emailing the newest versions to collaborators.

Does Dropbox Sync use data?

Yes, we're talking massive gobs of data. Quick fix: Bring up Settings, tap Camera Upload and then make sure it's disabled if you never want to sync photos to Dropbox. ... So if you've disabled Use Cellular Data and enabled this, Dropbox will only quietly sync your stuff in the background when Wi-Fi is available.