The Western Digital 256GB My Passport External SSD sports the USB 3.1 port that offers maximum reading speed of 515 Mbps. You can use this SSD with both Windows and Mac OS systems. This SSD can also be connected to USB 3.1 Gen 2 as well as USB 3.0, 2.0, or USB-A supported devices. This bus-powered SSD allows you to run a virtual machine on your computer system. With the included WD Security software, you can assign a password to keep the stored data safe via 256-bit AES hardware encryption. The provided WD backup software copies your files to your drive or Dropbox cloud service account. You have to reformat the drive to use the Time Machine backup software. This SSD offers impact resistance from up to 6.5 feet.