I downloaded an app called Dropbox, where you can (I assume) upload data to their server, then access it via your iPhone to listen to your audio, watch your video, etc, without having to actually have it on your phone. I downloaded the app and synced it with iTunes on my laptop, but I don't know where to go from there. How does a person (I don't know if my problem is specific to this application or not) transfer personal data from one's laptop to use on the iPhone? It's not like I can click and drop - is it?