Prerequisites: ngrok, and to adjust your config.php to use the SSL host, and to set $CFG->sslproxy = true; A dropbox account Atleast one image file in the account 2 Dropbox apps. Follow this guide as a reference using the ngrok address for the callback Dropbox app 1 - Full dropbox - A legacy 'Full dropbox' app Dropbox app 2 - Scoped app In the dropbox site, check both apps should have at least the following scopes assigned (under Permissions tab): account_info.read files.metadata.read files.content.read sharing.read sharing.write NOTE: The legacy app would have permissions set already and wouldn't require modification. Testing instructions (Using Dropbox repository doc as a guide) Full dropbox app - Skip this test if you don't have a legacy app Log in as an admin Setup the dropbox repository as defined in the moddle docs with DropboxApp1 Go to Private files and click on the 'Add' icon Select 'Dropbox' and login with your dropbox account Confirm you are allowed to do the following: Login to your account List files in your dropbox Search for files in the dropbox View the thumbnail of the image file in the popup that comes up after clicking on the image file Add file/link to your private file repo and save Scoped App Repeat steps #1 - #5 with DropboxApp2