I have a backup 3.5" 1tb hard drive. I need to know a way of encrypting the contents of this drive and require a password to access it. It does NOT have to be any sort of high level government super encryption. Just a format that would be EXTREMELY difficult for your average hacker / thief to crack. Any suggestions from an Expert that has had PERSONAL EXPERIENCE with a particular program? Must be easy to use and cost no more than $60. Free would be nice.