Dropbox integration allows you to share images within Content Items.
Step 1. Go to https://www.dropbox.com/developers/reference/getting-started select App Console.
Step 2. Click on Create app.
Step 3. Click Dropbox API, Choose App Folder, then Name your app and click Create app.
Step 4. Click Generate Access Token then copy the text.
Step 5. Go to settings in your App Admin Panel then paste in the Dropbox tab under Auth Token and save.
You have now set up Dropbox to be able to display Image Gallery via a folder.