Here is how to use Boxifier to sync a folder from an external hard drive to Dropbox:
- Connect your external hard drive
- Go to your external drive, choose the folder that you want to sync to Dropbox
- Right-click on it and choose Boxifier - Sync with Dropbox or just drag the folder to the Boxifier application window
- Click OK
- You will see the folder added to the list of folders in the Boxifier application window
- The folder will start syncing (a blue circle that appears on the folder's icon - just like with Dropbox)
- 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.