Amazon.com: Synology DiskStation DS918+ NAS Server for Business with Intel Celeron CPU, 8GB Memory, 256GB SSD, 8TB HDD, DSM Operating System : Electronics
How do you choose RAM for your Synology NAS? - Coolblue - anything for a smile
Synology DS918+ 16GB Guide – NAS Compares
Parts-Quick 4GB Memory for SYNOLOGY DS918+ DDR3L SO-DIMM RAM Module at Amazon.com
Synology DiskStation DS918+ Review « Blog | lesterchan.net
New DS920+, Flashing Lights after RAM Upgrade, more in comments : r/synology