I’m sorry to say that this is a rather naïve approach to long term preservation of data. There are surprisingly few solutions to preserve consumer data for more than a decade or so. If you really want to preserve your data for, say, decades, much less hundreds of years, then you need to think beyond the storage media you’re currently using. Even CDs fade after merely a few years of safe storage, leading to errors and data loss in the long run. Thus there are a multitude of factors you need to take into account before storing data for longer than a decade or so.