LG Optimus L7 II Guide De L'utilisateur page 415

NOTE: The LG-P710 supports memory cards up to 32 GB.
WARNING
Do not insert or remove the memory card when the phone is ON. Doing so
may damage the memory card as well as your phone, and the data stored on
the memory card may get corrupted.
To format the memory card:
Your memory card may already be formatted. If it isn't, you must format it before you
can use it.
NOTE: All files on your memory card are deleted when it is formatted.
1 On the home screen, touch
2 Scroll and touch Settings > Storage.
3 Touch Unmount SD card and touch OK to confirm it.
4 Touch Erase SD card > Erase SD card > Erase everything, then confirm your
choice.
5 If you have set a pattern lock, input the pattern lock then select Erase everything.
> Apps tab to open the menu.
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