Synology RAM DDR4-2666 Non-ECC SO-DIMM 4GB (D4NESO-2666-4G)

update: dec’21:

I already purchase one years ago for my DS220 and this one its just as flawless. Will run non stop for years. In addition, you ensure that warranty and support is available since its approved by Synology (of course)

Synology says if you use any memory but theirs your Synology will blow up and no warranty.

This was a great buy I caught a sale

The price of the memory is quite high for what it normally costs with third party vendors.

Works flawlessly with the DS 720+. The cost is high for RAM but using another unapproved modul will cause problems. For example; shut downs, data lose, clicking HDDs. Outright system crashes and random freezing.

It works, I now have 4 more GB of RAM in the NAS.

The extra Ram might speed up your NAS for certain tasks, like video recording.

The price for the Synology brand is too expensive.

Used on my Synology DS220+. Install was a breeze, start up and NAS recognized with no issues. A little pricey but worth it.