Aming at some high-end user, Seagate published FreeAgent GO. Just what you can see from this photo, slender design with some fashion. One importance thing is that its the slenderest removable HDD now.
As what I've mentioned below, it just 12.5mm thickness, support 500GB capacity. Random access time is 18.8ms, Average Read is 32.3MB/s, Burst Speed is 33.9 MB/s, write-in speed is 24.5 MB/s, just the middle class. But its selling point is that it can automatically backup your data through its software. By the way, it also support some general tech like encryption or other techs.