How to export your columns’ content:
- Go to your posts overview screen (or users page)
- Click on “Screen Options” (step 1) in the top right corner
- Click on “Show Export” (step 2) button
- You can now use the “Export” button to start downloading you CSV
- All the content is now stored in a CSV file on your computer.
Read more about exporting your WordPress content to a CSV file.