Administrators, along with Power Users that have been given the can run reports role can pull reports to see all the active upload links their users have created for auditing purposes. If you'd like to learn more, our Reports & Auditing Overview article covers all of the reports available to you.
Link Summary Report
The link summary report includes a list of all the active upload links pointing to folders on your account. These are labeled as Public upload in the Type column. Once you've run the report, you can instantly deactivate links right from this screen! Check the box next to each Public upload link and select the Delete option at the top of the screen.