LG Lucid VS840 Owner's Manual page 188

Settings
186
if there's no microSD card installed, if you've already unmounted it, or if
you've mounted the microSD card on your computer.
Erase SD card Permanently erases everything on the microSD card and
prepares it for use with your phone. You must unmount the microSD
card before you can format it.
Internal Memory
Total space Lists the total amount of user data area in internal storage
space of your phone.
Available space Lists the amount of user data space available in internal
storage space of your phone.
Erase internal memory Erase all data on the phone's internal memory,
such as music and photos.
System Memory
Available space Lists the amount of space you have available on the
system memory.
Backup and restore
Back up my data Back up application data, Wi-Fi passwords, and other
settings to Google servers.
Automatic restore If you reinstall an application, this setting restores
backed up settings or other data.
Personal data
Factory data reset Erases all data on phone.
Language & keyboard
Use the Language & keyboard settings to select the language for the text
on your phone and for configuring the on-screen keyboard, including words
that you've added to its dictionary.
Select language Opens a dialog box to choose a language to use on
your phone.
Input method Opens a dialog box to choose the text input method.
Swype Opens the Swype settings.