Title: Not for USB drives!
Review: As others have said, this cable will not transmit enough power to run a USB hard drive. Not a bus-powered hard drive, not a powered hard drive, not a hub connected to a powered hard drive. If you like the sickening beep that hard drives make when they're attached to an intermittent power source (and the sickening clicking they'll soon make after that), then go ahead and plug your drive into this cable. It's your honeymoon photos on there, not mine.But if you value your hard drive, heed my advice (which is identical to the advice others have posted here) and spend a few extra cents on a better cable. I thought the unit I got was defective, but the replacement cable (which cmple very responsively shipped) was exactly the same. Cmple has since very courteously refunded the purchase price of the product, and I think they deserve a lot of credit for that. But unfortunately it doesn't change the fact that, with hard drives, not working is just a feature this product has.
Is this product review negative?