Offering up to 4TB of expansive capacity and an array of color choices, Backup Plus Portable complements daily life by making room for digital life. 2 Year Limited Warranty. Works with Windows and Mac without needing to reformat. Up to 4TB of massive capacity portable external hard drive for file backup. Powered by USB connection. Offers customized backup and file mirroring. Compatible with USB 3. 0/2. 0. Have Space to Grow. Small enough for a loaded laptop bag, spacious enough for loads of content - Backup Plus Slim is the perfect marriage of easy portability and truly useful file storage. Easily plug into Windows and Mac computers via USB 3. 0 and enjoy helpful tools like customizable backup and folder mirroring.