It is a My Passport Essential SE 750 GB. So far I have only installed it on my XP Pro Machine. The default installation obviously did not install the SmartWare, and I am not sure if Smartware should be installed. I have 3 computers, (XP, Vista, and Win 7). Most of the files on the Passport will be files which I want to access from any of my computers. Is SmartWare smart enough to do automatic backups of 3 different computers. (I haven’t yet had time to read the manual because my attempt to copy a very large folder from an old WD iTB drive to the new drive has proved error prone, and I am still trying to get the two drives to sync.)