Hi @eduar,
It’s currently not possible to export contact engagements (notes, tasks, emails, meetings, calls), at least not out-of-the-box in the free CRM.
If you’re on the Professional subscription, you can create a custom activities report and export that report.
For free portals, there are workarounds using third-party integrations. I haven’t tested this myself but other users have mentioned import2 data migration.
Another alternative would be custom solutions based on the HubSpot Engagements API.
There is also a thread on this topic in the HubSpot Ideas section of the community. I’d recommend upvoting this thread and leaving a comment with your use case.
Hope this helps!