With a price that translates to almost US$600 (US$577 at today's exchange rate, to be accurate), the 2 TB Samsung 980 PRO SSD is a brand-new item that has no performance data listed yet. However, the values should be close to those of the 1 TB variant - up to 7,000 MBps read and 5,000 MBps write.
https://www.notebookcheck.net/2-TB-Samsung-980-PRO-SSD-surfaces-online-but-be-ready-to-cough-up-almost-US-600.508685.0.html