Product review (5 stars): For Specific Samsung Models
You don't have a choice about the water filter you use in your Samsung refrigerator, unless a generic is available -- something I wouldn't take a chance on.  The only choice you have is where you'll buy it, and, in this case, I found here to be the cheapest.  (Comparison shop when you need to buy.)  It fits my Samsung French door, model RF4287HARS.

Keep in mind that the red light indicating that a chance is needed is timed, not actual need, so if you don't use your water dispenser much, you can delay a bit.

-- Debbie Lee Wesselmann