You can migrate data to SAP S/4HANA Cloud Public Edition using the SAP S/4HANA Migration Cockpit, a tool that provides multiple methods of migrating data from legacy systems, SAP or non-SAP, to the target system1. The SAP S/4HANA Migration Cockpit supports the following migration methods2:
With XML or CSV templates: You can use predefined templates in XML or CSV format to fill in your source data and upload them to the staging tables in the SAP S/4HANA Cloud system. The templates are based on the predefined migration objects that cover the most common business data, such as master data, transaction data, and configuration data. You can download the templates from the SAP S/4HANA Migration Cockpit or from the SAP Best Practices Explorer.
With a separate SAP HANA database: You can use a separate SAP HANA database as a staging area to store your source data and transfer it to the SAP S/4HANA Cloud system. You can use any tool or method to extract your source data from your legacy system and load it to the SAP HANA database. You can also use the predefined migration objects or create your own custom objects using the migration object modeler.
Directly from an SAP ERP system: You can connect your SAP ERP system to the SAP S/4HANA Cloud system and transfer your source data directly without using a staging area. You can use the predefined migration objects or create your own custom objects using the migration object modeler. This method requires the installation of the SAP S/4HANA Migration Cockpit add-on in your SAP ERP system.
The other two options, with the zero downtime service and with Core Data Services, are not valid methods of migrating data to SAP S/4HANA Cloud Public Edition. The zero downtime service is a tool that enables you to upgrade your SAP S/4HANA system with minimal downtime, but it is not used for data migration3. Core Data Services (CDS) are a set of domain-specific languages and services for defining and consuming semantically rich data models, but they are not used for data migration4. References = Migrating Data to SAP S/4HANA Cloud, Public Edition, Migrating Data with the SAP S/4HANA Migration Cockpit, Zero Downtime Service for SAP S/4HANA, Core Data Services (CDS)