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Just click the Dropzone icon in the toolbar and click "+" and choose Amazon S3. In this example the domain is "jam.cloud.caringo.com" and DNS is configured so that https://jam.cloud.caringo.com resolves to Content Gateway S3. Dropzone uses the Server field as the endpoint and can include a port (but it must be https). The Root URL field is only used to generate the links placed in your clipboard after dropping a file.
