Color:Black ÿ|ÿ Size:4TB ADATA HD650 shock-resistant USB 3.1 portable HDD provides enhanced protection against unexpected brute force impact. HD650 utilizes full bandwidth made available by the newest SuperSpeed USB 3.1 interface offering data transfer speed several times faster than conventional external HDD with the previous-generation USB 2.0 interface. ADATA HD650 is also backward compatible with older computing devices supporting only USB 2.0 interface for seamless data backup and transfer. ADATA HD650 offers added security ? strong 256-bit AES encryption provides peace-of-mind protection of valuable and sensitive contents against prying eyes, keeping your data both physically and logically secured. ADATA HD650 is very easy to use and versatile ? simply plug into an available USB 3.0 or 2.0 port and it is ready to go. Free downloadable and Otago are available for you for use to backup data and install OS. ADATA HD650 also supports multiple OS platforms including versions of Windows, Mac OS X, and Linux. ADATA HD650 also comes with a 3-year limited manufacturer's warranty for worry-free ownership experience.