Export there, upload here
In Slack, export your data and download the zip. In Freesbe, open Workspace settings, Integrations & apps, Import from Slack, click Upload Slack export and pick the zip. Once the upload finishes you can close the window; the import keeps running. Freesbe imports whatever the zip contains: a standard Slack export usually has public channels only, and exports with private channels and DMs are available to owners on some Slack plans.


