The Rolling Stones' studio discography is a complex landscape due to diverging UK and US releases during the 1960s, which were not standardized until much later
To ensure you are getting legitimate, high-quality files rather than upsampled MP3s, stick to these official retailers: The Rolling Stones - Studio Discography -FLAC- ...
When building your FLAC library, keep an eye out for specific masters: The Rolling Stones' studio discography is a complex