You can import all files from your dropbox folders into Yumpu automatically which then will be converted into magazines.

To connect your account with Dropbox go to "Edit connections"

Click on "Connect with Dropbox"

Login to dropbox and allow the access to your files. After that you need to select a dropbox folder that should be connected with a section of your Yumpu account.

Choose "Dropbox", the folder you want to use and the section in which the magazines should appear.

You can create multiple connections and you can delete them anytime you want. If you go to "Tasks" --> "Logs" you can view what documents already have been imported and when.