RAM upgrade DS216+II to 16GB possible?
First thing, thank you for your website. It is really helpful.
I have a DS216+II with 1GB RAM and I’d like to upgrade it to 16GB. I read in your web that it is possible and I checked your list of Synology Models to RAM modules but just the 216+II is missing from the list. Could you tell me if the 16GB is really possible and which exact RAM module reference should I buy?
DS216+II RAM upgrade

Originally Synology DS216+II comes with a single memory stock of DDR3-1600 2G. You can upgrade it to 8GB Crucial or Kingston RAM. It will require to remove the outer casing.
Here is a list of compatible RAM:

8GB Crucial – CT102464BF160B DE USA UK ES
Crucial CT102464BF160B 8GB memory (DDR3L, 1600 MT / s, PC3L-12800, SODIMM, 204-pin)
8GB Memory for Synology DiskStation DS216+II RAM (PARTS-QUICK Brand) UK
Since memory stick is located on the other side of the motherboard you will need to remove it from the case.

You may find these video useful:

Here is a list of compatible RAM:

8GB Crucial – CT102464BF160B DE USA UK ES
Crucial CT102464BF160B 8GB memory (DDR3L, 1600 MT / s, PC3L-12800, SODIMM, 204-pin)
8GB Memory for Synology DiskStation DS216+II RAM (PARTS-QUICK Brand) UK
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I just upgraded my Synology 216+ II with Timetec ram and it works great. As long as you use the specified ram modules, pretty well any would work. I got a 8Gb Timetec ram stick for half the price of Crucial. Run Synology Assistant to be sure.