The DataStation microdisk.. From TrekStor....!

Trekstor dataStation Microdisk is a portable External hard drive which is an Ideal solution for daily backup and transporting/exchanging data, it is slightly larger than a credit card and light weight(between 65 to 75 grams.) and it comes in capacities of 20GB, 80GB or 120GB and has a sturdy aluminum housing which helps with heat dissipation...
It is similar to a USB flash drive with fast data transfer from Hi-Speed USB 2.0 connection (also compatible with USB 1.1).The DataStation microdisk include a copy of Nero BackItUp 2 Essentials, giving you a one button option for backing up files, and is suitable for use with Leopard’s Time Machine feature...
It's a plug and play device no driver installation is necessary and is computable with Windows® ME, 2000, XP, Vista, Mac® OS X, Linux® from Kernel 2.6.x..
It's price is kept a bit higher as 20GB version sells for about $135, the 80GB version is about $233 and the 120GB version is about $290.

Source : Trekstor DataStation microdisk via OHgizmo