How to put songs from iTunes onto a Samsung Galaxy S6?

I got a Galaxy S6 a few weeks ago and I was wondering how I could put my itunes music onto it. I know you can just have the Samsung music folder up and the iTunes music folder up at the same time on your computer and drag and drop the songs you want, and I've been doing that, but I have some songs in iTunes that I imported from a CD, and when I do the drag and drop thing the album art doesn't show up on my phone. So I was wondering if there's any easy and free ways to put my itunes music with the album art onto my Galaxy S6. I downloaded Samsung Kies and MobileTrans to try to transfer my music, but they didn't work. I'm fine dragging and dropping all the songs I bought off iTunes because they load onto my phone and show up with the album art. It's just the songs that were imported into itunes from CD'S that don't have album art once they're on my phone. Like those songs have album art on iTunes on my computer, the album art just doesn't show up on my phone. Also, one of the songs I bought from iTunes wouldn't convert into the format needed to play on my Galaxy S6, so I also need another way to transfer that song. Also I'm using a PC if that effects anything for ways to transfer music.

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