You can't save pictures to Gallery, because Gallery has no place to save pictures.
When you turn the phone on, a media scanner builds a database of all the media files on the phone (and the external SD card, if you have one). Gallery looks in that database to see what picture files that it can display you have, and it shows thumbnails of them. They can be stored anywhere, unless there's a file named .nomedia (note the leading dot) in the folder the picture is in or one above it. (That signals the media scanner to skip that folder.)
07-29-2015 02:03 PM