Seagate40G help the hard issues

Pre-U chassis I read other mobile phone memory can also connect the issue did not even other people's hard disk can also why I have to use this power in order to connect the hard drive ah others do not have the power I can to other machines Also tried to use the power it must still matter how ah???

Them very simple to put before the USB The shortage of power supply them to pre-General for the USB power 500mA, and mobile hard disk to start the current is usually 1A, the proposed use of the back USB try.That is because your hard drive power consumption of the big reasons.You can try bold Cable.Because of your hard enough voltage requirements, half of the USB interface is the voltage of 5V, you take a look at your mobile hard drive specification, the number of required voltage is?