Design a high-detail technical diagram that depict the system architecture and workflow interconnectivity within fixed wing cargo drones. These diagrams should clearly show the layout and functioning of integrated cloud technologies, ISR & C2 services, with specific emphasis on the following elements: Illustrate the path data travels from sensors and instruments aboard the drone through the processing units and finally to command centers. Use arrows and directional flow lines, highlighted in vibrant blue, to show data moving through various subsystems such as sensors, onboard Kubernetes-managed containers, and external communications links.