Firmware update 5.18.117 & OS 5

My Cloud OS 5 Personal & Network Attached Storage My Cloud
1

My MY CLOUD 4TB is running on firmware 5.18.117. Is this update for OS 5 or do I need to update to OS 5?

2

@hlklaege It’s OS5 if your still had OS3 it would show as 02.xx.xx!