I've only got 20 pictures on my device and more than a gig free space, so I don't think that could be the issue. Now I can start and go delete all sorts of apps, but come on, that shouldn't be really necessary to play a simple game like this, should it?
Now, I'm not a computer expert at all, but I really believe crowding the Temple of Abaad map with all the monsters from this quest is the real culprit here. It that is in fact the case, I wonder how tech-savvy the devs are if they can't foresee such problems