Synology DiskStation DS2419+ Hardware Installation Manual page 12

To make sure DiskStation recognizes the new memory capacity:
1 Install DiskStation Manager (DSM). (See the next chapter for more information.)
2 Log in to DSM as admin or a user belonging to the administrators group.
3 Check Total Physical Memory in Control Panel > Info Center.
If your DiskStation fails to either recognize the memory or start up successfully, confirm that the memory has
been properly installed.
To remove the RAM Module:
1 Follow step 1 to 3 of the "To install the RAM module" section to shut down your DiskStation, disconnect the
cables, and then remove the bottom lid.
2 Push the levers on both sides of the memory module outwards. The module will be released from the slot.
3 Hold the memory module by its notches and remove it from the slot.
4 Replace the side panel. Replace and tighten the screws you removed in the initial step.
12 Chapter 2: Hardware Setup