Open your camera app and select the gear icon on the top left corner, you'll see a whole bunch of options pop up and one of them will be where to save your pics, either device storage or the SD card.
Re: Ho W. How do I save pictures to device storage?
A quick add on to TXDreamer1's post, you may have to scroll down through the options (it's really not intuitive at all) you won't even realise you can scroll down just by looking.....