400 Selections of the world's finest music-- considering the market, they were probably referring to classical music, not, say, The Beatles, but let's say 400 works, an average of 1.5 CDs per, that gives us 420GB. But it's compressed, so lets use a reasonable 10:1 mp3 compression: 42GB
Over a thousand-- let's say 1050 full-color reproductions of greatest paintings. Certainly high rez, let's say 15MB per: that's about 16 GB.
231 timeless classics of western lit-- well, text is small, figure 1.5MB/book for: just under 350MB, double that with some illustrations and such.
What'll you do with the rest of your 100GB?
Last I heard, Hiroshima continues to this day to add the names of the atomic bomb's witnesses to its memorial as they expire-- some of cancer, some of natural causes. Can you fathom it? If you were born the day of the blast, you'd be in your early 60s today-- hard to believe that people who are necessarily older than 62 are dying of cancer and natural causes, and yet the bomb gets credited with these kills. Japan likes to keep its atomic wounds wide open for public display, while remaining mum about its own barbarities of wartime. The US and much of Europe, at least, has the decency to engage in a bit of self-flagellation now and then.
I don't think Japan is universally mum on that kind of issue. Like I said, there was fair acknowledgment of Japanese militarism there.
Besides, for me Hiroshima is the biggest pandora's box opening in the history of mankind. Nukes remain a big threat to humanity's future.