I have 32 gb usb 3.0 with 470 files of mp3s but when I connect in my( lx570 2017 model ) but it shows only 255 files in it, is there any specific requirements to view all the files & also I can not see cover page of this mp3 files , also please tell us any specific image or any other requirements to see that.

 

I think I have over a 1000 files. I put mine in folders, and then, I also use a free software to create playlist (m3u) or something like that. All mine are there. Did you format to FAT32?