Why the USB storage device is not recognized

When you want to use Flash or mobile hard disk to exchange data with the computer, but plug in the USB port when you find that the system can not recognize the USB device, what is the cause of it, here is a brief introduction to the exclusion of the USB storage device itself after the failure of the cause of such phenomena.

1, the front of the USB cable connection error. This type of failure occurs when the USB cable on the motherboard corresponds to the front USB connector on the chassis, which is also quite dangerous, because the positive and negative connection is likely to cause the USB device to burn.

2, USB interface voltage is insufficient. When the mobile hard disk is connected to the front USB port, it is possible that the system does not recognize the fault of the device. The reason is that the power of mobile hard disk is relatively strict, the front interface may not provide enough voltage, of course, inferior power supply may also cause this problem. The solution is to move the hard disk do not connect to the front USB interface, replace the inferior low-power power supply or try to use the external power of the hard disk box, if there are conditions.

3, the motherboard and system compatibility issues. Hehe This kind of fault is most famous is NF2 motherboard and USB compatibility problem. If you encounter this problem on the NF2 motherboard, you can install the latest NFORCE2 dedicated USB2.0 drivers and patches, the latest motherboard patches and operating system patches, or not, try refreshing the motherboard BIOS can generally be resolved.

4, System or BIOS problems. USB devices cannot be identified in the system when you disable USB in the BIOS or operating system. The workaround is to turn on the options associated with the USB device.

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