This deliverable defines the data management architecture and roadmap for the RI-SCALE Data Exploitation Platform (DEP), a federated system that enables Research Infrastructures (RIs) to manage and analyse large-scale scientific data using AI. It introduces the Data Lifecycle Management (DLM) subsystem, which supports secure, policy-driven data movement across cloud and HPC environments using tools like Rucio and FTS. Additional components cover data preparation, discovery, and popularity-based replication to optimise analysis workflows while limiting the use of storage space. Integration with federated identity systems ensures compliance with FAIR and access control requirements. Case studies from climate science, space research, biobanking, and bioimaging demonstrate real-world applications. The deliverable also outlines a phased roadmap toward full platform deployment, establishing the DEP as a foundation for cross-domain data reuse and integration with European Data Spaces.