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Before updating the phone software, it's 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 or crashes.
Install Samsung Kies 3
Find the download section on the web page to download Samsung Kies 3.
Download and install Samsung Kies 3.
Connect phone and computer
Select USB connection setting
Press Connected as a media device.