This article explains how to download all of your Facebook information to serve as a backup. Use a web browser to access Facebook or the Facebook app for iOS or Android devices and download the archive.
Whether you're planning to delete your Facebook account or want to back up all of your social networking data, you can keep your own offline copy of the photos and other content you've posted to the social media site in a single folder. This folder can easily be saved to a CD, DVD, or computer.
Here's how to download an archive of all your Facebook content using a web browser:
Open Facebook in a web browser and log in to your account.