The Seagate Backup Plus portable drive offers the mobility of a portable with the high capacity of a desktop drive. Under a sleek metal design lies up to 4TB of storagetwice the capacity of comparable 2.5-inch portable drives. This gives you the space to store your movie, music and photo collectionsand take them with you wherever you go. High-speed USB 3.0 and 2.0 connectivity offers plug-and-play functionality on your PC without the need of an external power supply. Install the ntfs driver for mac, and you can use the drive interchangeably between windows and mac computers without reformatting. Storage space 4TB: GB. USB 2.0. USB 3.0. Size H2.05, W7.8, L11.45cm. Http: //www. Seagate. Com/gb/en/support-home/.