I was told by a VERY good source that the plastic pages most of us store our cards and keys in will turn the light colored ones yellow because of a chemical problem in the plastic pages. He said it usually takes 3 to 5 years for this to happen, but when it does, it can be bad....My collection happens to be stored that way....so any suggestions on how to store them? I thought I would xerox them to see what I have then store them in boxes and also keep a copy of each page on a disc....any suggestions?