Ok here goes, Iam using a machine that has windows XP Pro. I have an external hard drive that I want to add security to. I use the external hard drive to move the contents of my d: drive located on my desktop machine to my laptop at home, replacing the laptop d: drive with the updated d: drive from my desktop. I want to, incase HD is lost or stolen, have the data secure. I want to be the only one that can view the files. I know XP can Encrypt and decrypt files, but can it encrypt the entire external HD? Also if the external HD is encrypted while plugged into the desktop will I then be able to access the files on my Laptop?