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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. Remember, you need to insert a memory card into your phone.
Install LG PC Suite
Find the download section on the web page to download LC PC Suite.
Download and install LG PC Suite.
Connect phone and computer
Select USB connection setting
Press the USB icon.