G-DRIVE mobile USB Portable External Hard Drives are the perfect compliment to your new Apple MacBook. Weighing in at less than 9 oz, G-DRIVE mobile USB is the ultra-portable and stylish way to travel with your important documents, MP3s, digital video and digital photo files. G-DRIVE mobile USB is bus powered, eliminating the need to carry an external AC power supply. G-DRIVE mobile USB is formatted at the factory HFS with Journaling and is Time Machine ready right out of the box. A simple initialization is all it takes to prepare G-DRIVE mobile USB for use with Windows systems. G-DRIVE mobile USB is backed by a standard 3-year factory warranty.