Zte BOOST B815 User Manual page 57

BACK UP AND FACTORY RESET
Easiest Way, Use an SD Card.
Insert a microSD card.
Use the built in Back up App to back up all your Apps and Data.
Manually copy all photos from File Manager > Phone Storage > DCIM
to SD > DCIM
Back up photos on line using Google Photo
Open the Photo App, this will save a copy of all your photos to your
Google Account
Copy Photos to a computer
Insert the USB lead into a PC. Connect using MTP mode, then transfer
all the photos from your device onto your PC.
FACTORY RESET
Go to Settings > Backup & reset > Factory data reset.
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