If you want to update the software on your mobile phone, it's recommended you back up the phone memory.
Connect mobile phone and computer
Back up phone memory
Open the cover on the left side of your mobile phone.
Connect the data cable to the phone socket and to your computer's USB port.
Start a file manager on your computer and find your mobile phone in your computer's file system.
Go to the required folder in your mobile phone's file system.
Highlight the required file and move or copy it to your computer.
*Please refer to the Sony website for more information or further support.*