Recommend a network disk:

I won’t tell you how to use it specifically. I tried it and it works, with 5G traffic per month. This is an example (due to the heavy flow of the example, there is no flow anymore and it is invalid, mainly in this form): /files/2010/7/26/2924744/music/yanhua.mp3

Additional There is also 5sing.

If you know how to build a website, you can use free space to build one yourself. The space at http://www.kilu.de/ is very powerful, with unlimited traffic and 10G space. You can also use one of my websites first, which can upload mp3s. I changed the background: http://oudy235.kilu.de/ and can generate a direct link address (the file name cannot be Chinese characters, otherwise it cannot be linked out). Bonus points if good.