Where is each product used mostly? I already decided that I'm buying a 1 TB hard drive, so which one is more suitable? I'm stashing my music, pictures, and videos on the hard drive. Since I'm most likely buying a WD hard drive, I first want to know the difference between the My Book and My Passport editions.The upper half is plain white plastic while the. The split design is similar to that of the recently launched My Passport and My Book models, while the colour scheme echoes the My Passport SSD.