Importing Site Data by Files
You can import site data by files after exporting them from the source site. This two-part process imports site data by files, but only after you export the files from the source site. First, you export the site data as files in your chosen type (CSV, JSON, or XML), then you import the site data from those files in the file type you chose.
Note: If errors occur during the migration, you can view, fix, and re-process them. For details, see Processing Site Data Migration Errors.