Facebook Retains More Data Than We Think

When you download a copy of your Facebook data, you will see a folder containing multiple subfolders and files. The most important one is the “index” file, which is essentially a raw data set of your Facebook account, where you can click through your profile, friends list, timeline and messages, among other features.

One surprising part of my index file was a section called Contact Info. This contained the 764 names and phone numbers of everyone in my iPhone’s address book. Upon closer inspection, it turned out that Facebook had stored my entire phone book because I had uploaded it when setting up Facebook’s messaging app, Messenger.

This was unsettling. I had hoped Messenger would use my contacts list to find others who were also using the app so that I could connect with them easily — and hold on to the relevant contact information only for the people who were on Messenger. Yet Facebook kept the entire list, including the phone numbers for my car mechanic, my apartment door buzzer and a pizzeria.

This felt unnecessary, though Facebook holds on to your phone book partly to keep it synchronized with your contacts list on Messenger and to help find people who newly sign Jari Kurri Authentic Jersey up for the messaging service. I opted to turn off synchronizing and deleted all my phone book entries.

My Facebook data also revealed how little the social network forgets. For instance, in addition to recording the exact date I signed up for Facebook in 2004, there was a record Ezekiel Elliott Womens Jersey of when I deactivated Facebook in October 2010, only to reactivate it four days later — something I barely remember doing.

Facebook also kept a history of each time I opened Facebook over the last two years, including which device and web browser I http://www.ccoocajastur.com/lynn-swann-jersey-c-1_12.html used. On some days, it even logged my locations, like when I was at a hospital two years http://www.jmusedesign.com/joe-looney-c-2_24.html ago or when I visited Tokyo last year.

Facebook keeps Arik Armstead Jersey Womens a log of this data as a security measure to flag suspicious logins from unknown devices or locations, Authentic Troy Polamalu Jersey similar to how banks send a fraud alert when your credit card number is used in a suspicious location. This practice seemed reasonable, so I didn’t try to purge this information.

But http://www.all4xbox.com/anthony-chickillo-jersey-c-1_10.html what bothered http://www.goldenknightsnhlproshop.com/nicolas-hague-c-1_25.html me was the data that I had explicitly deleted but that lingered in plain sight. On my friends list, Facebook had a record of “Removed Friends,” a dossier of Nigel Bradham Authentic Jersey the 112 people I had removed along with the date I clicked the “Unfriend” button. Why should Facebook remember the people I’ve cut off from my life?

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