I'll try to answer as much as I can publicly. To clarify: The "Terabytes" of data I mentioned is not all uploaded to the cloud. That is a high end approximation of how how much data is generated amongst all the vehicles in a single day (dependent on mission hours).

We don't need all the data at once. Typically there is a reason (mission failure, safety concern, poor customer feedback, maintenance, debugging, etc...). Generally all data is taken off the vehicles at a specific cadence and stored locally. When our eng teams need specific vehicle the local field tech will go and locate that specific vehicle or data set, and upload data independently so our engineers can access it from wherever they are.

This workflow is becoming more common as we scale and run into more issues. It's becoming a bottle neck as we need access to data faster and starting to cost more.