Nope, this is a front-end interface for getting your files from the user to the browser and then to your Rails app.

Paperclip and Carrierwave (I highly recommend Carrierwave) manage the actual storage of the file data (ie on S3) and the incorporation of the file into your ActiveRecord model (I'm glossing over a lot but hopefully you get the idea).

Basically, Dropzone would be a companion to your Rails-based file storage mechanism.

1. I highly recommend trying out Carrierwave in place of Paperclip.

2. This replaces your file_fields. You'll still need something on the backend to deal with image storage and management, like Paperclip or Carrierwave.