Android Music Folder

[zootcake]

So I used to use my old s3(kitkat) as a music phone but recently I decided to put all of it on my s5(lollipop). Every album worked fine and most covers were fine. But when I put it on my s5 I just threw it on the sd card in a folder I made knowing my phone will find it and process. The problem is it finds only 2 of 37 albums. All of these worked fine on my s3. I have tried multiple players and still get same results. I have tried moving all of it into different folders but nothing works.