Hi all,
wanting to use dropbox with my mixstream, followed the tutorials for downloading etc but when it comes to pairing with my controller ‘dropbox’ is not on the source menu, beatsource, soundcloud, beatport all are.
Also can you plug an android phone into it via usb? iphone is a no
any ideas? 
In settings → services → cloud turn Dropbox on
Use this option to retrieve your Engine library database from a cloud storage service. You must first use the Engine DJ software to back up your database. Then, when this option is set to On, the selected service will be available in the Source menu and you can access these files over an established internet connection.
You can plug an Android phone in the USB, but not use Android as Source. The phone will charge and might even pass an internet connection trough USB.