Synology RS1221+ Hardware Installation Manual page 16

To remove the memory module
1 Follow step 1 and 2 of the "To install the memory module" section to shut down your Synology NAS,
disconnect the cables and remove the top cover.
2 Remove the memory module from the slot:
a Push the levers on both sides of the memory module outward. The memory module will be released from
its slot.
b Hold the memory module by its edges and remove it from the slot.
a
b
c
3 Replace the top cover by following step 5 of the "To install the memory module" section.
4 Reconnect the cables removed in step 1, then press the power button to turn on your Synology NAS.
16 Chapter 2: Hardware Setup