Upgrading from 4.14 to most recent version

Hi all.
I´m trying to upgrade my VPS hosted traccar instance. First, I want to backup config and data but /opt/traccar/data directory seems to be empty (both via SSH and WinSPC gui).
Any hint would be great!

You're probably not using H2 database.

Thanks Anton. How can I know the database model I'm using? As I remember, I used all defaults settings when this traccar instance was installed.
BTW, Thanks for your superb work !

Check the configuration file.