[MM3-users] Migrating archives from mailman2 to mailman3 with attachments

So I see the process for migrating an archive from mailman2 to mailman3 https://docs.mailman3.org/en/latest/migration.html.................. i.e python manage.py hyperkitty_import -l foo-list@example.com $var_prefix/archives/private/foo-list.mbox/foo-list.mbox

but does the migration handle attachments?? attachments are in ..../archives/private/foo-list/attachments.

I assume this is if you are upgrading in place?

I am migrating to a new server and my plan is to follow these steps but copy the config.pck. and .mbox files to the new server and import them, but then it looks like I need to copy the attachment directory? if so how do I import the attachments to mailman3?