4 Things to Know About the DS420+ RAM Upgrade
The DS420+ has 2GB of DDR4 soldered directly to the motherboard. This memory cannot be removed or replaced.
It includes one SO-DIMM slot that accepts a 4GB module. This brings the total to 6GB maximum.
The 6GB ceiling is tight for a 4-bay NAS. Most 4-bay models in this class support 8GB or more.
The upgrade is easy to install but limited in payoff. You get a modest boost, but the soldered 2GB remains a bottleneck.