Why were my photos and videos erased?

[AC Question]

Today I took quite a few photos and videos that were incredibly important to me. I know that they were originally saved in my 'gallery' because after I took them I went back to make sure I was happy with how they turned out.

My phone battery wound up dying. After I had charged it and turned the phone back on I discovered that the majority of my photos and both videos were missing.

Any ideas on why this happened or how I could recover them?

 

[operon]

Check if the media are available using any file maneger, if so, clear gallery data and cache and also clear media provider data and cache and restart your device