Experts estimate that 80 to 90 percent of the data in any organization is unstructured. Many organizations believe that their unstructured data stores include information that could help them make better business decisions. but to analyze unstructured data, there are some main challenges in terms of data migration. This course introduces the basic concepts of unstructured data, Alibaba Cloud unstructured data migration tools and service, Alibaba Cloud unstructured data SDK and how to use OssImport tool for unstructured data migration.