Dear user! Hello, first of all, there is no problem in connecting the device to read, which means that the interface is OK. In the 8.1 system,The USB 3.0 driver is automatically integrated by the system, so it is recommended to check the device with an exclamation point under the device manager first. If there is no exclamation point, try another device. If there is an exclamation point, it is a 3.0 device. In this case, you can give priority to the automatic update of Windows. If it does not work, there is no problem before,You can back up the data on the desktop and restore the system to the previous state. Try this: right click Computer - Properties - System Protection - System Restore, and select the previous restore point to restore. We look forward to your satisfactory comments, thank you for your support for Lenovo, and wish you a happy life!
