Here is the answer for your question in my comment on PlayStore.
1. Yes. I saved my pictures in SD Card. All of them. But the issue that
bother me a lot is that pictures which lost and I can't even find anywhere
(including tried to connect with computer) are in "DCIM-Camera" folder in
SD Card and another folder named "Camera" too, same in SD Card (but the
video file in both folder is okay. They aren't lost!). The second folder
consists of my old picture from my old smartphone and I never saved
anything in that folder. This conditions has been okay since I use this
phone (Asus Zenfone 5) 4 months ago and I already updated "Gallery" apps
without any lost pictures, until last week, without installing any new apps
I just restart my phone as usual and this terrible things happen.
Please please help as far as you can. Memories in picture can't be reply...