LG G Pad 7.0 V400 Guide De L'utilisateur page 346

NOTE: Your personal data—including information about your Google
account and any other accounts, your system/application data and
settings, any downloaded applications and your DRM licence —might
be lost in the process of updating your device's software. Therefore,
LG recommends that you back up your personal data before updating
your tablet's software. LG does not take responsibility for any loss of
personal data.
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