Newer Crucial RAM module

[ed]

Yes, the module you linked — Crucial CT16G4SFRA32A — is indeed compatible with the Synology DS220+ for an unofficial memory upgrade. It's a DDR4-3200 SODIMM, and while the DS220+ officially supports DDR4-2666, faster modules like this one will simply downclock to the appropriate speed, which is perfectly fine.

more info:
https://nascompares.com/answer/synology-...tible-ram/