In the camera app's settings you can change the resolution of the pictures or videos your device will take. A lower resolution photo will take up less space on your device but may not look as good as a high resolution photo.
1.
From the Camera app, tap the Settings icon.
2.
Tap the Image size icon.
3.
Select an image size.
4.
Swipe from the top or bottom edge of the screen to return to the Camera app.