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. The HD-B1 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.