This document discusses the development of a grid data infrastructure called MataNui to manage large amounts of observational astronomical data and metadata from a collaboration between researchers in New Zealand and Japan. The infrastructure uses existing open-source tools like MongoDB, GridFTP, and the DataFinder GUI client to allow distributed storage and access of data while meeting requirements like handling large data volumes, metadata, and remote access. This approach provides a robust, reusable, and user-friendly system to address common data management challenges in scientific collaborations.