SecureStix USB Password Protect 2.0
It's simply amazing, the files are locked and hidden from view, so a potential thief wouldn't even know that they existed on your device or on the computer unless they had this software - and even then, they'd need your password to unlock it.
When you are ready to unlock them again, simply run this program, enter the password you typed in when you locked the folder and presto! your files are unlocked and ready to use again.
If you've forgotten your password, there's a handy feature called a "hint", this is the hint you can write in at the time of locking the folders (eg if your password is your dogs name, you might write in "dog" for the hint) .
This software has been designed with ease of use in mind and comes with a built-in tutorial to guide the most novice of USB Flash Drive users.