The Additional Settings tab has the following fields:
Set file size limit for attachments – Maximum file upload size can be 50 MB.
Set blocked file extensions for attachment – This contains the list of file extensions (semicolon separated) which the Connector won’t be able to upload on Cloud. You can enter it as per your preference. e.g., txt;docx
Click on save and the ‘New Connector’ is created with a form notification as “Click on Authenticate button to authenticate the connector”.