150MB out of 16GB, yeah, significant part..., less than 1%
But still the point stands, it was common in the 80s and 90s: http://www.osnews.com/story/24...
I guess the AC's lawn belongs to his parents
M-DISC's design is intended to provide greater archival media longevity.[1] Millenniata claims that properly stored M-DISC DVD recordings will last 1000 years.[2] While the exact properties of M-DISC are a trade secret,[3] the patents protecting the M-DISC technology assert that the data layer is a "glassy carbon" and that the material is substantially inert to oxidation and has a melting point between 200 and 1000 C.
Source: Wikipedia.
But even ordinary CDs last (mostly) for 10-20 years in my experience, see my other comment
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For God's sake, stop researching for a while and begin to think!