sqlite db doesn't change despite new entries?

[microSoftware]

I set the volume /data/ExerciseDiary to /home/microsoftware/workout/ExerciseDiary
The config.yaml has been changed but the sqlite.db hasn't changed 1 byte.
After a fresh install, It was 16384 byte. And adding few entries it's still the same number.

Question: it's obviously saved because when i refresh the page, the entries i just added are still there. But where exactly is this data stored?

Also, I copied/pasted the whole folder from my old machine to a new machine. And i can't find all my data i added (it was only 1 week worth of data). But still i want to know where is my data stored and how to back it up and how to restore it.