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Before updating your phone's 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. Follow these instructions to back up the phone memory.
Install BlackBerry Link
Find the download section on the web page to download BlackBerry Link.
Download and install BlackBerry Link on your computer.
Select USB connection setting
Connect phone and computer
Back up phone memory
The phone memory is backed up.