Hi
I want to upgrade my moodle 1.9 to 3.2.0
so please help me to tell whole process and my data should not be losed
Thank you
https://docs.moodle.org/30/en/Upgrading
From 1.9 you need to go the latest version of 1.9, then to 2.2 then to 3.0. There are a lot of changes along the way, specifically to questions and file system. You should search these forums - there are lots of threads.