Exporting files out of Chordie

It's not so much a matter of exporting files from Chordie as much as it is a matter of "Importing" things from Chordie into your app.  Chordie stores no "files", just links to files out in "webland" and a tiny patch of code so the music you linked to is displayed in a uniform manner (and any preferences you might have set, such as left-handed, alternate tuning, or other instrument). 
There used to be a thread devoted to the subject, but because every App is different (and we are not Technical Support people for those guys) you would be better served by checking out the support pages of their website..... under the topics of:  How do I add songs to my Songbook? and such.

Dropbox is more of a cloud storage service and handles documents and things of that kind well, but I doubt is complex enough to resolve links and process raw data to display it as a finished form...... its more like a remote portable hard drive.
  Thanks for askin' anyway, Welcome to Chordie!!