Facebook finally build an option for Backup your Facebook Page Settings and Information as well, Along with these you can export your Posts and updates on your Page,
How to Export Settings?
To do this you must goto your Facebook Page settings Tab then Navigate to General > Download Page
You must click on Download Page option for further process. After that it may ask you for clicking on Get started you have to click then a start downloading will appear click on Start Downloading.
When you done with clicking on start downloading a message will appear saying Download Requested and it will inform you after collecting information then you can download it via Email which you have provided in your Profile. Only Admin of a Page will be able to have backup for his Page,
I’m still not sure what will happened if your Facebook Account get blocked and your the only admin on your Page.
Also Read: Anonymous Declare War on Facebook! (2016)