N.H. Rev. Stat. Ann. § 31:132

A municipality may offer storage space for paper records or other storage media formats, such as electronic records, and associated records management services to any agency of the United States government, political subdivisions of the state, and qualified non-profit organizations operating under Internal Revenue Code section 501(c). A municipality, by written agreement, shall establish a rate for service that is no higher than the actual expense of operation and associated capital costs.