i have been searching the net and manufacturer's of external hard drives to see if i can find external hard drives that have dual power sources? i mean, power via USB cable as well as AC cable? do these even exist? if not, does anyone know why not? ps) and i am talking about a GOOD SIZE hard drive, not those 40gb small ones. 200gb and above! thank you.
3.5" hd's need 12 volts to spin the motors but usb only supplies 5 volts so all 3.5" externals use ac for power. same goes for external rom drives. 2.5" hd's use usb for power or can also use ac adapter for power.
thank you ddp moderator for answering me. so, one other question, big size external hard drives are ALL 3.5? aren't they? i need a big size external hard drive that i can use with my pc, ps2 and eventully a ps3.
