You specify the retention time of temporary data in the SAP S/4HANA Migration Cockpit in the migration project. The SAP S/4HANA Migration Cockpit is a tool that allows you to migrate your data from your legacy system to your SAP S/4HANA Cloud system using different approaches, such as file-based, staging-based, or direct transfer. You can use the Migrate Your Data app to create and manage migration projects for each approach. A migration project is a container that stores all the information and settings related to a data migration process, such as migration objects, migration templates, source files, target systems, or error logs. You can specify the retention time of temporary data in the migration project settings. Temporary data is the data that is stored in the staging tables or files during the data migration process and is deleted after the retention time expires.