I got a new laptop with WIndows 8 Pro.  I have my Passport with all the back up information from my previous laptop (Windows 7), but when I connect my Passport to the new laptop, it shows it like if it were empty.  So the laptop asks me if I want to do the back up from the laptop itself to the Passport, I guess because the Passport shows as empty?  Maybe I did something wrong and the new laptop is reading in a wrong way the Passport?  Or there is some sort of incompatibility?  (I already upgraded the Passport to the latest version).

Please if someone could provide me with an advice?

Thank you very much,

I assume you used the Smartware for your backup. First try changing to show hidden files. Sometimes you do need to do a backup on the new PC to see the old backup check out this post