A friend of mine asked me a question I was unable to answer, so I thought I'd ask if anyone out there has any specific knowledge. He's storing shellac pressings, open reel tapes, CDRs and DATs in an unheated garage in the Northeast of the U. S. Temperatures in Winter can go below 0 degrees Fahrenheit, and are often in the single digits above 0. The materials are stored in heavy duty, sealed plastic boxes. Will any harm come to any of the materials by being stored in Winter in that environment? He currently has no other place to store this material. I'd like to give him some wise advice, if I can. Thanks in advance. Best, Jon Samuels