Title to all files, records, books, papers, equipment, fixtures, furniture, moneys, and other property possessed by the unorganized county, or in its name, upon the date of its disorganization, or thereafter acquired by it, shall be vested in the adjoining organized county to which it is attached as trustee for the unorganized county, with the right to use the same for the benefit of the unorganized county in the same manner as organized counties may use their property. Separate accounts and books shall be maintained for the moneys and properties held in trust and for the moneys and properties of the adjoining organized county.