#2
You would have to rip the files onto your computer with a media player or an encoder. But you're not allowed to put copyrighted files on your profile anyway.
#3
yep - you're only allowed to upload mp3s of music you have made yourself (original songs or covers you have done), not mp3s of other artists' work.

if it's your own music that you've recorded to cd, you need to rip it to mp3 first, then upload the mp3. i use a program called CDex to rip from cd.
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