If you want to upload your file to cloud and download to your pc and mobile phone, Dropbox is the best choice to do it.
Dropbox provides 2GB for free.
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I'm using Dropbox service to hosting mp3 music. If you upload mp3 file to public folder, you can get public link of mp3 file. And then you can use boomp3.com website to make a embed tag to host to website.