How to change camera default save location? When I was using the camera of my Sony Xperia S, the following message popped up.

So how do you change the default save location of your camera (as highlighted with red underline)?
Note: Yes, my memory was full and the message stopped showing up after deleting some files of course. I just want to know how to change the default for CAMERA.
When you see this message first select OK then select sub menu and it gives you options such as scenes selection, resolution, flash etc. What you got to do is slide the tile and go to the second tile. There you should be able to find data storage where you can change where you want to save your pictures at. 

Alternately, the gear icon (for settings) in the slider at the bottom of the camera (where you select flash, effects, etc.) will take you to the settings dialog where you can then choose a different save slot (under Save Location).