Your Facebook profile most likely holds tons of your most precious photos and videos, and like your computer, you should back up all that data just in case. Here, I'll tell you how to download all of your Facebook content, from wall posts to photo galleries.
Download Your Data From Facebook
You can download a copy of all of your Facebook data right on the social network. Just head to Account > Account Settings > Download a Copy of Your Facebook Data (this link will be in the bottom left-hand corner of the Account Settings window). Included in the download is your contact info, photos, videos, notes, and wall posts as well as chat conversations, friend lists, events, and comments made on your wall posts. If you do choose to back up your Facebook data (it's recommended!), then be sure to keep it in a safe place, like a password-protected file on an external hard drive.