The StarLight Consortium is a participant in the Open Storage Network (OSN) supports science and scholarly research that requires data storage and transfer at scale, by simplifying and accelerating access to data that is in active use by ongoing research projects. The OSN places particular emphasis on large data (hundreds of terabytes) sets that are often difficult to share, and long tail data sets that are often difficult to find and access. Deployment of the OSN is a response to the increasing importance of storage as the third component of national cyberinfrastructure, complementing investments in computing and networks. While other uses may emerge over time, the OSN is intended initially to serve two principal needs: (1) facilitate smooth flow of large data sets between data and computing resources such as instruments, synthetic data projects, campus data centers, national supercomputing centers, and cloud providers; and (2) make it easy to expose long tail data sets to the entire scientific community. The OSN is a functionally and administratively coherent federation of storage systems, referred to as Pods, that reside at independent sites. The OSN design leverages well defined standards and APIs that accommodate local variation while ensuring uniform global behavior. This approach is intended to enable scaling to hundreds of pods with aggregate raw capacity of hundreds of petabytes.