What is best practice for regular Thingworx backups?

Since few days ago I thought you have to do PG DUMP and backup ThingworxStorage folder and maybe also webapps/Thingworx. But I accidentally recovered only database and it looks like all came back as expected. Well, what a hell, so I tried to delete ThingworxStorage and whole Thingworx folder in webapps. After that, I started tomcat again and all gets magically recovered from database... all seems to work fine.

Can someone confirm that only database backup is sufficient from now on?