I can't tell how you are moving photos. In my LG G4 I have the Photo app save to the SD card directly so no moving. On my LG G4 open the camera app and click on the top left gear icon, then under the Gear will show internal or another icon that depicts the card. I use the card all the time and have for about a year.

I do NOT use CM and AVG optimizing suites in my phone. For me I found them to create trouble.