I want to download some tracks from this site but then this hits me:

LEGAL DISCLAIMER: BY DOWNLOADING THE FOLLOWING ALBUMS YOU AGREE THAT YOU LEGALLY OWN THEM, AND THEREBY ACCEPT ALL LEGAL RESPONSIBILITY BY DOWNLOADING THEM. IF YOU IN FACT DO NOT OWN THEM, YOU ALSO AGREE THAT THE WEBMASTER IS NOT LEGALLY RESPONSIBLE AND YOU ARE DOWNLOADING AT YOUR OWN RISK.

What exactly does it mean? Is it free to download or do you have to own the albums before you can download them?