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Question: Could I connect USB2.0 cable to USB3.0 external HDD device and USB3.0 external HDD device run at SuperSpeed mode?(5/6/2010) Answer: USB3.0 and USB2.0 cable has some differences, please refer below picture to check your USB cable is USB2.0 or USB3.0
If you connect USB2.0 cable on USB3.0 external HDD device like below, it will not run at SuperSpeed mode.
Please connect USB3.0 cable on USB3.0 external HDD device to run at SuperSpeed mode.