How does the Dropbox backup work?
The Dropbox integration connects your Feedly account to a Dropbox account of your choice (it does not have to be the same email address associated with your Feedly account) and creates a folder in Dropbox/Apps/Feedly Vault where 3 subfolders will be created:
OPML backup : This is where your sources you follow will be backed up daily in the OPML format.
Saved For Later : This is where all the articles you have added to Read later in Feedly will be saved and organized by date (year).
Tags : This is where all the articles you have added to Boards in Feedly will be saved, organized by the Board name.