My first impression of Ubuntu can't be very good when I can't understand this. It's under 'Install Ubuntu alongside Windows 7'.
It just doesn't make any sense, guys.
One side of this 'drive' space is 'Files (3.2gb) /dev/sdb2 (ntfs). The other side says 'Ubuntu /dev/sdb3 (ext4)
Under each of the options it says 125.0 GB!!!
Are the files the ones extracted and consisting of Ubuntu? If so, why are they separate from the 'Ubuntu' to its right? Why would these 'files' take the place Ubuntu does not and vice versa?
I'm not going to go forward because god knows what could happen.