BRAND NEW/OPEN BOX/SEALED IN PLAST Seagate Expansion desktop hard drive is user-friendly, requiring only a power adapter and USB cable to get started. USB 3.0 allows fast file transfers for efficient data management. Easily save files by simply dragging and dropping them, with no additional setup required. It automatically recognizes both Windows® and Mac® computers for quick installation, although reformatting is necessary for Time Machine compatibility.