Quick theoretical question involving taking music downloaded on my phone and adding it to my PC

Hi all,

I have a 5s running 7.0.3 and I may or may not have downloaded a few songs from Mewseek. Now that I have upgraded to the 6s, I’d like to take the music off my 5s and add them to the library on my PC. I’m told if I download songs via mewseek they are not added to the library on my PC. Is there a way that you could somehow possibly import files downloaded from mewseek to the library?