Synology 16GB DDR4 SDRAM Memory Module at Amazon.com
Amazon.com: Synology 4 Bay NAS DiskStation DS418 (Diskless) & Western Digital 4TB WD Red Pro NAS Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5“ - WD4003FFBX : Electronics
Synology UDIMM Non-ECC RAM DDR4-2666 4GB (D4NE-2666-4G) at Amazon.com
Synology RAM DDR3L-1866 SO-DIMM 4GB (D3NS1866L-4G) at Amazon.com
Synology NAS DiskStation DS1520+ (Diskless), 5-Bay; 8GB DDR4 (B08FT1SFKY) | Amazon price tracker / tracking, Amazon price history charts, Amazon price watches, Amazon price drop alerts | camelcamelcamel.com
Amazon.com: DS420+ 4-Bay DiskStation Bundle with 6GB RAM and 16TB (4 x 4TB) of NAS Drives and 2TB (2 x 1TB) NVME Cache Fully Assembled and Tested by CustomTechSales : Electronics