Developed and integrated ZFS reflink support into both the Radarr and Sonarr repositories, extending copy-on-write file transfer capabilities to ZFS volumes alongside existing Btrfs support. Leveraged C# and system programming skills to update file system operations, specifically by invoking TryCreateRefLink and TryRenameFile during copy and move actions. This approach enabled faster, more space-efficient handling of large media files, reducing I/O load and improving scalability for media libraries. The work ensured consistent reflink behavior across both projects, laying the groundwork for future cross-filesystem optimizations and enhancing the developer experience for backend file transfer workflows.