Export from the current platform
Keep the original export unchanged. Large sites are easier to verify when posts, media, and member files are separated according to the source platform's export tools.
Preview the mapping
Choose the source at /migrate and upload the export. Review page paths, block mappings, media references, authors, tags, and redirects before pushing the bundle.
Verify the new site
Check representative long posts, media-heavy pages, archives, redirects, and subscriber counts. Keep the old site available until the new deployment passes these checks.