Why wont my lg g3 recognize media (my pics and music) that is located in internal storage?

[Brittanyms3]

So my phone is rather new to me. It is thru verizon. not rooted. havent made it that far yet. Iv bluetoothed photos from my old phone (at&t windows phone) and transfered some over from my windows labtop. Everything as far as i knew transfered over no problem. All there. When i opened gallery . all there. *** well as when i opened music. All my usic was displayed. then one day went to open up my music player and it showed no music. Went to gallery to find noting. So i then went to filemanager. it said 0 music and 0 images but all my documents were still there. then via filemanger>all files>internalstorage>pictures they were there but all displayed as stock mountain pic till i clicked on them individualy. why wont gallery and music player recognize them???? help. sorry tried to be thorough as poss.

 

[LordLugard]

Might be a fluke or bug or something else. This might help. Hold down on "Gallery", go to " Info", scroll down a bit and clear its "cache". Reboot and see what happens.