Which of these are the best mp3 hosting sites are the best?? I might start a message forum for underground artists to post music.

Free mp3 hosting, upload mp3 | upload file direct link - Kiwi6 Mp3 Upload

http://instaud.io/

Free Internet Radio - Discover Artists Online Music - HulkShare

http://www.audiomack.com/

https://hearthis.at/

I am not asking about Soundclound if you know any more good sites for hosting mp3s post them.