Share your experience!
Hi @pikola628,
I'm sorry to hear that. As @uliwooly suggested does this behavior persists if you reboot your device to safe mode?
If it does I would recommend that you try and reset your media storage app. To do so go to: Settings > Apps > Tap the ... > Show system > Media storage > Storage > Clear data > Ok. Then restart your device and wait for the phone to scan your internal and external storage for media files. Note that this won't delete any pictures of videos but the phone may not show you media files for a few minutes after you clear data for Media storage.
Let me know how it goes!
Sorry for a late reply. I've list my password and could not acces my previous account. But I have tried the safe mode reboot and it still didn't work. What next? 
Thank you for the sugestivno
But I cannot fino the "show sistem" optični. The only thing that opens up when I tap on... (menu) is "sort by Size", "sort by date", and "reset app preferences". What did I do wrong? Thank you 