Old Cassette Player How Can I Download Music And Play On My Car's Cassette Player?

How can I download music and play on my car's cassette player? - old cassette player

How do I download music and play old cassette in my car? I have a converter that can play me on my portable CD player. Is there a similar device for the DS (or other) media? - Note: I have a portable media player, and it is also necessary. And he has the quality to be high, either - something cheap, it works.