If you are looking for a backup device to protect your digital data then you can buy this Sony HD-B1 1TB External Slim hard disk (Black) external storage system for your PCs. you can also use this HD-B1 External Slim hard disk to expand your PC’s internal memory. Its large 1 TB space for storing provides you with an ingenious reservoir to accumulate your information for fast anytime access. This External Slim disc offers you the requisite flexibility and movability to move around along with your information for swift access from your multiple devices. You also have a secure backup for a simple retrieval to stop permanent information loss. High-Speed and efficient Performance This HD-B1 External Slim disc connects along with your desktop or notebook laptop via a USB 3.0 transfer interface. Your information gets transferred and saved into the External Slim Hard Disk blazing-fast.