Hello freinds I am Sudhansh srivastava and I am going to tell about Lenovo harddisk F309.It has the capacity of 1 tb. Optimized for safeguarding essential data while on-the-go, the ThinkPad USB 3.0 1TB Secure Hard Drive ( 0A65621) offers high-level 256-bit Advanced Encryption Standard ( AES) security within a slim, lightweight, self-powered, easy-to-use design.Its connectivity is via 2.0 and 3.0 interface.No requirement for an ac power adapter.All stored data is fully encrypted using the AES 256-bit secuirity algorithm and it is with attractive protective caring case.And it has non skid anti vibration pads.And it has multi copoured LED device status indicator.And you have seen that it is filled with specifications and features. But it is too cheap .