MAMP cloud features allow you to store and retrieve your localhost in the cloud. MAMP will save both your localhost document root folder and selected database data to your Dropbox. It is not necessary to install the Dropbox software to use this feature, you just need to login to your Dropbox account through the MAMP interface. You will also need a Mac user account that is part of the Admin group to install the cloud features. Go to Preferences > Users & Groups to confirm.