Upgrading grafana from 7.3.3 to 9

I want to upgrade grafana from 7.3.3 to atleaset 8.5
will it effect my existing charts?
please let me know how to take backup ?
do i need to take grafana db backup mysql?
how to take charts backup?


The upgrade documentation includes recommendations for backing up your database which would be the same steps you’d want to take before migrating: https://grafana.com/docs/grafana/latest/installation/upgrading/#backup