Folder Security is a software program designed to protect your sensitive data on internal, external and removable drives. The program supports Windows XP, NT, 2000, ME, 98, and 95 OSR2. You can install Folder Security right on your USB external or removable drive and lock/unlock folders at any computer your drive is connected to. Folder Security is very easy to use. Just click the Lock Folders button, select the folder and enter the password.