(1) Purchase the USB external hard disk enclosure that working well and there is quality assurance.

(2) Purchase a notebook hard drive to do a low-power external hard disk.

(3) It is necessary to take account of the capacity of power supply of USB interface when you purchase laptop computers and other less port USB devices.

(4) External hard disk enclosure should better have self-supporting power lines, good external hard disk box will provide a transformer, general also has a single PS2 or USB power lines, be sure to plug in when the power supply shortage, even if the USB interface Power driven hard enough, if not short-term work, proposed to plug, USB interface power supply is always reluctant.