The supreme court may authorize the disposition of its own closed court files and records more than five years old and such files and records of the several courts of record. Disposition may consist of destroying useless or duplicative files or records, or providing for archival storage of files or records, or the destruction of court files and records when photostatic copies, photographs, microphotographs or reproductions on film are made and placed in conveniently accessible files and provisions are made for preserving, examining and using them.