Buffalo MiniStation DDR High Speed USB 3.0 1 TB Portable Hard Drive (HD-PGD1.0U3) Mega Cache Accelerator greatly increases file transfer performance, up to 2X faster Compact form makes it easy to take your files on the go Use with your PC or Mac computer for added capacity or backup Set up worry-free, automatic backups for your PC or Mac computer Secure your data with password protection and software encryption Includes Buffalo Tools, a free software suite of feature-rich tools for Windows computers Optimal for reading and writing large audio/video files 3 Year Warranty