The Dropbox API provides an interface that you can use in your app to upload and download files to and from Dropbox, though it doesn't provide any special support for preferences in particular. If you can store and retrieve preferences as files though, that should work fine.
We love to learn from the educators who use Dropbox. Whether you teach kids, teens, adults or a combination of all three, we want to know what apps and integrations you use with Dropbox to help with teaching. Which of the ones below is your favorite, or most used tool?