Four lithium niobatecrystals doped with Cu:Ce, Mn:Cu:Ce, Mn:Fe, and Mn:Fe:Mg, which are processed under two different oxidation/reductionconditions, have been studied experimentally for non-volatile holographic storage withultraviolet and red light. The non-volatile holographic storage in LiNbO3:Cu:Ce and LiNbO3:Cu:Ce:Mn crystals is realized. The results show that higher oxidizedcrystals may realize non-volatile holographic storage. The persistent diffractionefficiency of non-volatile holographic storage of LiNbO3:Cu:Ce crystal is the largest on the premise of high signal-to-noise.