With USB Flash Block/Unblock 1.0.12 you can lock/unlock the function to use Flash Drive/Mass Storage/External Drive on a USB port. This application also suitable for system administrator to limit or totally disable USB mass storage device within an organization.

Features:

Small and lightweight. Only 665kb (zipped)
Extremely easy interface. No-brainer for anyone without IT knowledge
Quick set and reset.
Useful message will be displayed if an error occur.
Royalty-free for personal / commercial use.