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:AnswerKeep in mind since that Iphone model has a lightning connection, you will need to transfer your pictures and video directly to this external drive by using a computer like a desktop or laptop.
The external drive would be connected to the computer.
There is no way to transfer directly from that Iphone model directly to this drive.