4GB Memory for QNAP TS-251D Compatible DDR4-2400 260 PIN RAM Module SODIMM (PARTS-QUICK Brand) at Amazon.com
QNAP TVS-872X-i5-8G-US 10GbE Desktop NAS, 8-bay
QNAP QNAP-TS-932PX 4G 9 bay NAS Enclosure 4GB DDR4 RAM Nas Network Storage Server Nas Server - AliExpress
QNAP TS-264 2-Bay High-Performance Desktop NAS. Intel 4C/4T Processor, burst up to 2.9GHz with 8GB DDR4 RAM On-Board, 2 x 2.5GbE, 2 x M.2 2280 PCIe Gen 3 x1, 1 x PCIe