Distribution Control Over Secondary Files Through Public Links
When generating a link to a public item, you can now control access to secondary files.
Select the new Primary Files Only check box in the Copy Public window to distribute only primary files externally. This check box is selected by default for new links, so you must explicitly deselect the check box to distribute secondary files.
Public links that existed before this release will continue to provide access to both primary and secondary files until you update them.