A:AnswerYes it is bus-powered. There is one cord for connection but because it's small it doesn't require any more power than what's delivered through the usb cord that's supplied with it.
A:AnswerYou could do that by connecting this external drive and phone to your computer first. Then use your computer to copy the data to the external drive. No way to transfer from the phone directly to the external drive without using your computer.
