How do you put your music onto memory sticks - if you do?
1) You can buy it from iTunes, or Amazon, or the artist, etc ... or some sketchy guy with a server in Moldova
2) You can "rip" (ie "digitize") your own CDs/LPs/Cassettes, etc ... the musical equivalent of scanning a negative/slide
3) You can "borrow" files from your friends ... and most loosely defined, you have LOADS of friends willing to share with you over the internet