Add encryption to USB Flash Drive on the market.'USB Flash Security' is security software that protects data in a USB Flash Drive by a password. It locks by the password by only removing!Data in a USB Flash Drive is protected by a password.Useful Security Tool.There are five editions in 'USB Flash Security' for personal user.Free:Up to 4GB ONE,+:Up to 4GB ONE,++:Up to 8GB TWO,#:Up to 16GB TWO,##:Up to 2000GB THREE.