Well that's because the question is meaningless - What does it mean "all your personal data"? What does "where" mean? Physically? Which tables? Which data is relevant? Friends? Friends of friends? Ad data? Behavioural data? ANY inferences, models built on user datasets that might include that user?
They don't even know how to ask the right questions to get to what they want to know.
They don't even know how to ask the right questions to get to what they want to know.
Context: I worked at Facebook