Here is how to use Boxifier to sync a folder from an external hard drive to Dropbox:

  1. Connect your external hard drive
  2. Go to your external drive, choose the folder that you want to sync to Dropbox
  3. Right-click on it and choose Boxifier - Sync with Dropbox or just drag the folder to the Boxifier application window
  4. Click OK
  5. You will see the folder added to the list of folders in the Boxifier application window
  6. The folder will start syncing (a blue circle that appears on the folder’s icon - just like with Dropbox)
  7. Wait until the folder is done syncing (green checkmark on the folder’s icon)

From the moment that you setup a folder from an external hard drive to be synchronized, Boxifier will automatically sync all changes made inside that folder, once you connect the external hard drive to your computer.