ASK NC

Using crucial 16gb (CT16G4SFD8266) was working before, out of no where about a month ago, caused nas to become unaccessibile. Removed the ram, and can connect to and access ram. Install ram, And can no longer access or connect to Nas. Using a Synology DS920+ with wd reds

You could run the memory test https://kb.synology.com/en-me/DSM/tutori...nology_NAS
If that doesn't work, the memory might need replacing.

I hope this helps.