Godaddy MySQL DB's seem to grow larger sooner than i expect

I have one site hosted at godaddy, its a gallery with a forum attached to it, this year i haven't updated the gallery much, and the forum is very small but the MySQL DB Backups from there seem to grow larger than i expect them to.

Like if i was adding plenty of photos (which i haven't recently) then i would expect the file to be bigger, but ive not.

Anyone else noticed this? I really should move away from godaddy, but because they have their own control panel and i would be moving to hosting preferably with cPanel, im nervous about any problems that i might encounter.

Also i think i read somewhere before that godaddy have a mysql db size limit of 200mb i think.