Nev. Rev. Stat. § 3.307
A district court, on its own motion, may order destroyed or otherwise disposed of any exhibit or deposition introduced in the trial of a civil action or proceeding or filed in such action or proceeding which:
2. If appeal has been taken, remains in the custody of the district court or clerk of such court 2 years after final determination thereof, or which remains in the custody of the district court or clerk of such court for a period of 2 years after:
(d) The introduction or filing thereof where there is no provision for the destruction or other disposition of such exhibit or deposition and where, in the discretion of the district court, the same should be destroyed or otherwise disposed of.
The order shall be filed with the pleadings of each case in which any such order is made.
(Added to NRS by 1971, 318; A 1973, 439)