Huawei Ascend Mate User Manual page 69

1.
Use a USB OTG cable and USB cable to connect the two phones.
2.
Enable the USB mass storage function on the phone from which you wish to read data.
3.
On your phone's home screen, touch
4.
Touch Storage > Mount USB storage.
5.
Read data from the microSD card of the other device.
Do not remove a storage device from your phone before unmounting;
otherwise, data may become corrupted. Before removing the device, touch
on the home screen. Then touch All > Storage > Unmount USB storage
to unmount the USB device.
Your phone supplies power to USB storage devices. Certain phone models
and mobile hard drives have relatively high rates of power consumption,
meaning your phone may not be able to supply enough power for them to
run properly.
then the All tab.
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