having trouble importing a beat

a friend of mine makes beats and emails them to me and my old MacBook air would import them but I couldn’t convert them to mp3 to send them back. I went and bought a Lenovo 330 and now I cant get it to even import the beats.
HELP

Which version of Windows?
Which version of Audacity? (look in “Help > About Audacity”)
What format are the “beat” files?