How to add songs received via email just by using the phone?

[Trocien]

Hello,

My brother sent me his Christmas song he recorded via email. I am curious if there is a way I can add it to XBox music library without plugging it to the computer and dragging it to the phone.

I can download the song and listen to it, but I am wondering if there is a way to have it permanently there so I can pull it up any time I want using Xbox music.