In order to export your comments, you need to:
- Click on any of your media, whether on the My Posts page or elsewhere
- Click on the 'Comments' toggle
- Click the Download arrow to export your comments.
Please note, comments exports are limited to a maximum of 300,000 comments.
The time it takes for the comments export to be generated will vary - please allow up to 2 hours, in particular for posts with a large number of comments.