You will not have to sit on your computer for hours wondering which old files to delete in order to make some room for new files - be it personal photos, movies, TV shows, or other business files - if you have this HD-B1 external hard drive in your collection of computer accessories. Connectivity Ports This hard drive is designed with one USB 3.0 port and one USB 2.0 port that offer speedy transfer of data. Sleek, Smart, Spacious This is a compact, pocket-size portable drive that allows you to store up to 1TB of data. Compatibility Although the drive comes formatted with NTFS file system that is compatible for use with Windows OS, it can be easily reformatted to a file system that supports reading from, and writing to this disc when it is connected to a Macbook.