How To Password Protect USB Drive?
Folder Lock is a security solution for all your data security needs, it lets you keep your personal files protected in a variety of ways, in both PC and portable drives. Folder Lock uses government-level 256-bit AES encryption algorithm to store and protect your important files and folders in Lockers. ALL Lockers, whether portable or otherwise, can store any number of files as they are dynamic and resizable.
Protecting your portable data with Folder Lock is a breeze. Protect USB enables you to convert your existing Lockers into self-executable applications (EXE) that you can copy to your USB or external drives. You can then simply execute them on any computer and enter the correct password to access your data even if you don't have Folder Lock installed on the end computer.
When you create a portable Locker bigger than 4 GBs in size and make the Locker portable, Folder Lock will create both a Folder Lock portable.EXE file as well as the Locker file(s) into the selected destination. Please note that the .EXE file will not be dependent on the number of Lockers made portable, and therefore, will remain as a single file that will allow you to run and explore your Locker(s).
To start converting an existing Locker into a portable one and copy it to your USB/External drives , follow the instructions outlined below:
Simply run Folder Lock and select the Protect USB option from the Protect USB/CD feature.

Here you will be required to enter details for the existing Locker.

The 'Locker Location' field, as shown in the above sanpshot, will ask you to locate your existing Locker you have saved on your computer. Select the Locker and press 'Open'. Next, enter the destination for the portable Locker in the 'Select Your USB Drive' field. This will be the destination where the existing Locker will be copied as a portable Locker. After you have entered the required details, click on 'Next' to start the Locker copying process. After the portable Locker and the .EXE file creation has been successfully completed, click on 'Finish' to close the wizard.
You may add any number of files to the portable Locker as well as any number of folders, so long as you do not exceed the Locker data size limit or the USB space limits.