Facebook knows literally everything about you
Behind every feature, Facebook is collecting data
Facebook’s terms and conditions are a giant lie. They are purposely misleading, too long and too broad. So you can’t just read the company’s terms of service and understand what it knows about you.
That’s why some people have been downloading their Facebook data. You can do it too, it’s quite easy. Just head over to your Facebook settings and click the tiny link that says “Download a copy of your Facebook data.”
In that archive file, you’ll find your photos, your posts, your events, etc. But if you keep digging, you’ll also find your private messages on Messenger (by default, nothing is encrypted).
And if you keep digging a bit more, chances are you’ll also find your entire address book and even metadata about your SMS messages and phone calls.