Privacy
Factory data reset – If you select Factory data reset, it will erase all of your personal data from the internal phone storage, including information about your Google account, any other accounts, your system/application data and settings, any downloaded applications and your DRM licence.
Resetting the phone will not erase any system software updates you have downloaded or any files on your microSD card, such as music or photos. If you reset the phone in this way, you are prompted to
Storage
< USB connection mode >
Mass storage only – Your phone can be used as a mass storage device if you have a memory card inserted. You can set Mass storage only as a default setting for USB connection mode.
< SD card >
Check total available SD card space. Touch Unmount SD card for safe removal. Erase SD card if you want to delete all data from the SD card.
<Internal storage > Checks the available space.