The act of seeking a "discography download" differs fundamentally from streaming a "Greatest Hits" playlist. The downloader seeks the totality of an artist's output—the B-sides, the unreleased tracks, the live bootlegs, and the critically panned albums that sit alongside the masterpieces.
Yusuf’s official Bandcamp page is a goldmine. You can stream before buying, and Bandcamp allows unlimited re-downloads in any format (MP3, FLAC, ALAC, OGG). cat stevens discography download