Upgrading RAM in Synology DS420+?

[Enquiries]

I am looking to purchase the Synology DS420+ to use in my home mostly as a Plex Server for my media library.

I would like to upgrade the RAM to a total of 6 GB by purchasing a 4 GB Memory Stick. I would like to purchase it from a third vendor given that Synology's memory is expensive.

I am struggling with finding information of which memory stick will work in the device.

Below are the two I found from Crucial but would like confirmation that it works with DS420+. Secondly, is there a difference between 2666 MT/s vs. 2400 MT/s

https://www.amazon.com/Crucial-Single-PC4-19200-SODIMM-260-Pin/dp/B019FRDKWI/ref=sr_1_2?dchild=1&keywords=ct16g4sfd824a&qid=1607094211&sr=8-2&th=1

Crucial 4GB Single DDR4 2400 MT/S (PC4-19200) SR x8 SODIMM 260-Pin Memory - CT4G4SFS824A

or

Crucial 4GB Single DDR4 2666 MT/s (PC4-21300) CL19 x8 SODIMM 260-Pin Memory - CT4G4SFS8266, 4GB Single Rank

When I posted the question on Amazon Answers the manufacture said it is not compatible therefore I am at a lost of which memory to buy that is cheaper than the Synology Brand.

I would even be willing to go up in RAM to get a compatible memory as long as I am not spending around $100.00

Thank you

[ed]

Look up ds420+ on this list https://nascompares.com/2020/04/06/synology-nas-memory-upgrade-guide-2020-edition/This should take you to a compatible RAM.I hope this helps.