Samsung 8GB KIT(2 x 4GB) DDR4 3200MHz PC4-25600 1.2V 1R x 16 SODIMM Laptop RAM Memory Module M471A5244CB0 at Amazon.com
Amazon.com: Samsung Galaxy Book Flex 13.3” Laptop|QLED Display and Intel Core i7 Processor|8GB Memory|512GB SSD|Long Battery Life and Bluetooth-Enabled S Pen|(NP930QCG-K01US),Royal Blue : Everything Else