software to lock folder or data

Data Lock allows you to hide your personal and confidential data and makes it safe for you to carry around your removable disks with important data. Data Lock is fast file-security software that can password-protect, lock, hide, and encrypt any number of files, folders, drives, pictures, and documents in seconds. Locked files and folders are undeletable, unrenamable, unmovable, hidden, and inaccessible.

Download here  Datalock