I created that data, so it's mine by law. Or it is data that was never mine in the first place. Plus, my google data is stored in 3 places: Google, Dropbox and local system. If 2 of them fail, I still have the other.
As to who can access that data, well, that's a question for everybody isn't it? If I would run my own server on the internet that would also be the same question.
So yes, I'm pretty sure it's MY data. I'm also protected by EU laws.
Does your house burn down that often?
Frankly, getting deplatformmed is a much higher-probability event.
> and they contain all data I own.
No, they contain all data you think you own.