The freecom mobile drive mg has been specifically designed as storage expansion for your macbook key features ultra thin mobile hard drive in stylish design complements the macbook magnesium enclosure ultra lightweight and environmentally friendly connects to the usb port of your macbook mac hfs formatted 100 timemachine compatible power via usb port no need to carry a bulky power adapter the perfect mobile hard drive next to your macbook the freecom mobile drive mg has been specific