Huawei Mate 8 - Manual (Page 157)

Accessing the Internet
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2
On the other phone, set the USB connection mode to USB flash drive.
3
Touch > Local > USB drive to browse data on the microSD card. You can select and
copy data to a destination folder. For more information, refer to Copying, moving, or
deleting files .
4
When you have finished browsing, touch Settings > Advanced settings > Memory &
storage > USB drive > Eject.
5
Disconnect the USB OTG and USB data cables from both phones.
Transferring data between your phone and a USB storage device
Your phone can access data on USB flash drives, card readers, and other storage devices
directly with a USB OTG cable.
1
Connect your phone to a USB flash drive with a USB OTG cable.
USB OTG cable
USB cable