Huawei P9 Lite - Manual (Page 186)

Settings
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Viewing your phone's specifications
View your phone's specifications in a few simple steps. You can view information about
your processor, memory, screen resolution, and more.
Open Settings and touch About phone. Swipe up or down on the screen to view
information about the processor, RAM, internal storage, screen resolution, IMEI, and
more.
Viewing the available storage space
Check that there is enough space on your phone's internal storage or microSD card
before downloading update packages or large files.
Open Settings and touch Advanced settings > Memory & storage to view storage
information.
Touch Default location to set the default storage location to Internal storage or SD card.
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 > SanDisk SD card.
3
Touch Format > Erase & format.