use nommedia file for don't show your media files in gallery

1.  go  to file manager and go to option and click show hidden file
2.  now go to android>data and find .nommedia file 
   
    
3.  now copy .nommedia file and go to your files folder you want to hide and paste it.for example movies folder, video folder and images.
4. now go to file manager option and select hide hidden file that's it.now open your gallery and you see your folder media not show on your gallery.
   
   for any question please comment bellow