Seagate Backup Plus 4TB Desktop External Hard Drive USB 3.0 (STDT4000100) High-speed USB 3.0 and 2.0 connectivity offers plug-and-play functionality on your PC. Install the NTFS driver for Mac, and you can use the drive interchangeably between Windows and Mac computers without reformatting. Run a one-click backup or schedule an automatic backup plan to protect your files in your Backup Plus desktop drive at your convenience with Seagate Dashboard software Works interchangeably on PC and Mac computerswithout needing to reformat