Use the Storage settings to monitor the used and available space on your phone and on your microSD card, to manage your microSD card, and if necessary, to reset the phone, erasing all of your personal information.
Backup Assistant Plus Storage
Total space Lists the total amount of space on Backup Assistant Plus Storage.
Available space Lists the amount of space you have available on Backup Assistant Plus Storage.
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SD card
Total space Lists the total amount of space on any microSD card installed in your phone.
Available space Lists the amount of space you have available on any microSD card installed in your phone.
Unmount SD card Unmounts the microSD card from your phone so that you can format the card or safely remove. This setting is dimmed if there’s no external microSD card installed, if you’ve already unmounted it, or if you’ve mounted the external 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 space on any internal memory installed in your phone.
Available space Lists the amount of internal phone storage available.
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 settings restores backed up settings or other data.
Personal data
Factory data reset Erases all data on phone.