I'll pitch in with a recommendation for a shared Bandcamp account, and here's why:
Bandcamp offers the flexibility to download music in various formats, including [.ogg], [.flac], [.wav], [.mp3], and more.
When it comes to privacy, Bandcamp is better than Spotify. Creating a Bandcamp account can be more discreet, requiring only an email and a password, without the necessity of a monthly subscription. In contrast, Spotify's privacy features are less robust, involving a more intricate registration process, massive data collections, and ongoing monthly payments.
Furthermore, Bandcamp provides Gift Cards, making it simple to add credit to your account for transactions. Another notable privacy feature is the ability to hide your purchases on your profile page, adding an extra layer of confidentiality to your music choices.
You can utilize apps such as Auxio to play the music files you've downloaded for local playback."