Earlier quoted context omitted.
Storing that much data about users isn't harmless just because the company doesn't do anything bad with it. Even if that company would forever be good , they could still have their servers infiltrated into or stolen, or some government could decide that they want the data over night.
If you're looking at risk though: * Computer could have been compromised * Wifi/local network could have been compromised * Your ISP could have been compromised * Some of the peers on the internet between your ISP and google " * The datacenter where Googles servers are And that's before the data gets to Google. I'd guess that the most common privacy theft is at the first 2 steps - local computer / wifi network. Any o…
It's about what that amount of data about a whole country 's population could be used for.