For those looking for a comprehensive collection of AR Rahman's Tamil discography, the following platforms are highly rated for their high-quality audio and extensive libraries: ARR Songs-2-b-v : Free Download, Borrow, and Streaming
Before you click that tempting link on a blogspot domain, understand the three major dangers:
On JioSaavn, you can download entire albums (like Rockstar or OK Kanmani ) for offline listening with a subscription. It is effectively a legal zip file.