raspberry pi upgrade

How to upgrade Raspberry Pi to Raspbian Buster
thanks to the framework already from debian, upgrading the operating system of raspberry pi is very simple. in addition, if you want to use the existing raspbian installation on the new raspberry pi 4, you can do it once it is upgraded to buster.
Raspberry Pi 4: All information about the product and launch date
this is the latest information about the next raspberry pi 4 product of raspberry pi