Now click here to open Facebook General settings. (https://www.facebook.com/settings)STEP 2:
Now, you can see "Download a copy", just click on it. and it would lead to you in the next page as shown in the image.
Now, click on "Start My Archieve", once you click on it, it would ask for your facebook password for security reason, put your password and click on "continue".
After clicking "continue". A pop up would appear, to Request Download.
Just click "Start My Archive"
Now once you click on "Start My Archive" it would take bit time, and gather your entre download and would mail it to your registered facebook email ID.
Now after clicking Okay you would recieve a mail from Facebook, which subject would be "Download your Facebook Data"
This would be just the confirmation email from Facebook that you have requested for your data.
Few minutes later you would recieve another email from Facebook containing link to download your data. The file would be a zip file and would open in .Html format.
Open your data and you could save it.
Hope this would help you. Kindly share the same with your friends, family and relative so that more people could get informed about this trick.