If you're a 11th grade student, I recommend you to practice the College Board's 8 sample papers first. Then, you go for the SAT practice papers available on TestprepKart website in Downloads section.
If you're taking the SAT Subject Test along with SAT, I suggest you to practice the Subject Test sample papers released by the College Board. CB didn't release them officially, but they released the SAT Subject practice books.
I walk you through the SAT Subject Test official sample papers and solutions which are alike the real SAT tests.
Check them at [url=https://www.testprepkart.com/campaign/sat-test-series-&-solutions.php]SAT Subject Test official sample papers and solutions[/url]
I believe this stuff helps you a bit.