($9.99/month) allows you to download up to 10,000 songs per device for offline listening. You can create playlists of any size and download entire albums with one click. At 2000 songs, you're using about 10-15GB of storage.
Modern music streaming platforms offer built-in "Offline Modes" that allow you to download thousands of songs legally to your phone or computer. 2000 songs zip file
A standard MP3 song at 128 kbps (the bare minimum for decent quality) averages 3.5 to 5 MB per track. For 2,000 songs: 2000 songs zip file