Optical holographic storage in single‐crystal LiNbO3is described which can be optically erased at room temperature and then rewritten with no degradation in efficiency or writing rate. The diffraction efficiencies associated with this process are about 10−4. Some variations from previously reported results include a lack of a threshold power density for writing, very‐long‐term persistence of the stored hologram, and a lack of a dependence of the diffracted intensity on the polarization of the readout beam.