Under this circumstance, please try another connection mode, such as MTP, PTP and USB Mass Storage.
MTP: MTP stands for "Media Transfer Protocol." When adopting this protocol, the Android device will be loaded to the computer as a "media device." MTP mode was widely promoted as a standardized protocol for transferring media files to digital players via Windows Media Player and similar applications.
PTP: PTP stands for "Picture Transfer Protocol." When Android uses this protocol, it appears to the computer as a digital camera.
USB Mass Storage: USB mass storage is the standard protocol used by flash drives, external hard drives, SD cards, and other USB storage devices. The drive makes itself completely available to the computer, just as if it were an internal drive.
After you have checked USB Debugging Mode, installed the device driver or trusted the computer, the device still can't be read, follow the operations below:
1. When connecting the device to the computer, there will be a pop-up prompt to remind you to install the driver first if there's no driver detected. Check Install.
2. If the device still fails to connect after the driver has been installed successfully, please check whether the driver is disabled under Device Manager. You can find the driver in Device Manager—Android Phone. Right click the certain node and click Enable if the driver is disabled. The device then will be connected to the computer.
Please check "Always allow from this computer" on your device if it asked you to do so. If the prompt box disappear by accident, please disconnect the device and try to connect again.
USB Debugging Mode refers to a developing function provided by Android. With this function, users can copy and transfer data between computer and Android devices, install APPs on Android devices, read log data, etc.
Note: The USB Debugging Mode is off by default. You need to turn it on manually. The wired connection can be established only if the USB Debugging Mode is turned on.
For Android 2.3 or earlier
For Android 3.0-4.1
For Android 4.2 or later
If you have checked USB Debugging Mode, installed the driver and trusted the device, but the device still can't be read, do as the following operations:
If your phone didn't pop out window to grant FoneGo root privilege before scanning files, follow the operations below on the premise that your phone has been rooted, and you have FoneGo on your phone.
Authorise with SuperSU
Authorise with SuperUser
Authorise with KingUser