If you find you're struggling to collect all the files you need in one convenient place, the Balloon web app allows you to congregate multiple users onto one page using a single link to your Dropbox account. The added feature to this app is that the additional users don't need to have a Dropbox account in order to add files to yours.
The Balloon app is a handy tool that brings people together that don't all necessarily use the same platform but with a joined mission. That mission is to collect various files -- whether music, pictures or documents -- from a group of people. The Balloon app allows the creator to make a link to their profile that they can share and have non-Dropbox users add to with added password protection. Hopefully Balloon will expand as an extension to other platforms as well.