Huawei P9 - Formatting the Microsd Card

Settings
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1 Open Settings .
2 Touch Advanced settings > Security .
3 Touch Set SD card password and follow the onscreen instructions.
Touch Change SD card password or Clear SD card password to change or remove the microSD
card password.
Formatting the microSD card
Format your microSD card to delete all data and free up storage space.
Perform a backup before formatting your microSD card to prevent losing important data.
1 Open Settings .
2 Touch Advanced settings > Memory & storage > SD card .
3 Touch Format > Erase & format .