Well that sucks... I use whatsapp as my primary messaging service and the pictures and videos take up a lot of space quickly. From what I can tell there isn't any way for these to be saved to SD automatically either and basically when I run out of space I have to manually move them.
Anyone have any other tips or tricks for saving storage space? I previously had the S6 which also had the small internal storage and I basically had to back up and delete app my pictures and videos. I know the built in camera can store to SD by default, which I've set up, but that's only a fraction of what actually takes up space...