You can use the download your information tool to download all your data on FB, including all your messages https://www.facebook.com/help/212802592074644 https:

You can use the download your information tool to download all your data on FB, including all your messages https://www.facebook.com/help/212802592074644 https://www.facebook.com/help/212802592074644 A Brooklyn based artist did this recently and made a book of his conversation history (and covered an apartment with some of the pages). You can find a bit more information and pictures at https://www.halfspace.uk/messages-2011-2017 https://www.halfspace.uk/messages-2011-2017