The model UN2 external USB 2.0 hard drive provides a fast and easy way to add more storage! It is compatible with PCs and MACs (laptops/desktops) and is powered using the included USB 2.0 cable, eliminating the need for a power adapter! The stylish black enclosure features a unique aluminum body engineered to effectively dissipate heat and allow for silent operation! The included software eliminates the need to push a button or click an icon to activate a backup. The software can operate automatically in the background saving your files to the drive while you work! Everything you need to backup your data is in the box!