[Here's] how much of your information ... Facebook and Google store about you. Google stores your location ... every time you turn on your phone. You can see a timeline of where you've been from the very first day you started using Google on your phone. Google stores search history across all your devices. Even if you delete your search history and phone history on one device, it may still have data saved from other devices. Google creates an advertisement profile based on your information, including your location, gender, age, hobbies, career, interests, relationship status, possible weight ... and income. Google offers an option to download all of the data it stores about you. I've requested to download it and the file is 5.5GB big, which is roughly 3m Word documents. Facebook offers a similar option to download all your information. Mine was roughly 600MB, which is roughly 400,000 Word documents. Facebook also stores what it thinks you might be interested in based off the things you've liked and what you and your friends talk about. The data they collect includes tracking where you are, what applications you have installed, when you use them, what you use them for, access to your webcam and microphone at any time, your contacts, your emails, your calendar, your call history, the messages you send and receive, the files you download, the games you play, your photos and videos, your music, your search history, your browsing history, even what radio stations you listen to.