BuddyPress.org

Hi everyone,
I have over 25000+ users on my site from 22 years ago when we had an active community. Now our site is only resource for information and people can see topics and replies but adding anything new is turned off.

My question is how to remove all users who have not posted, commented, created a topic or a reply in bulk?

Or at least where do all the forum data stored?

Thank you for your help and guidance.

Diana