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Before updating your phone's software, it is recommended that you back up the phone memory to ensure that no data is lost. It can also be useful to back up the phone memory regularly to ensure that no data is lost in case of defects and crashes. Follow these instructions to back up the phone memory.
Install Samsung Kies
Find the download section on the web page to download Samsung Kies.
Download and install Samsung Kies on your computer.
Select setting for USB connection
Connect phone and computer
Back up phone memory
Follow the instructions on the screen to copy data from the phone memory to your computer.