Mobile hard drive not available on front USB connector

This usually occurs because the USB 1.1 structure is used for the front USB port on the computer chassis, and the USB 2.0 interface mobile hard disk is used on the USB 1.1 hub socket, which makes it easy to make mistakes. Also, although the front USB interface is 2.0 of the standard, but because of repeated wiring or extension cord is too long to cause the resistance to rise, resulting in the USB 2.0 interface power supply is not enough. Therefore, when using a mobile hard disk, it is recommended to use the USB 2.0 interface on the motherboard to avoid similar occurrences.