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Before updating the 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, crashes etc. Follow these instructions to back up the phone memory.
Connect phone and computer
Connect the data cable to the phone socket and to the computer's USB port.
Press Mass storage.
Back up phone memory
Start a file manager on your computer and find your phone in the computer's file system.
Go to the required folders or the required files and move or copy them to the computer.