Lindy USB Port Lock: Probably the quickest and easiest way to deny USB access is by using a physical lock on the ports. It’s not as flexible as software alternatives, but these Lindy USB locks ...

Lindy USA also makes USB Type-C/Thunderbolt 3.0 port blockers that you can use on the latest MacBook Pro or your USB Type-C equipped smartphones. Cost: $22.95 for a pack of 4 [Find it on Amazon ...