If it is 6,543,800,000 printed books: the bibliographic data is calculated according to each book, each record is about 6,543,800 bytes, and there are about 3 million kinds and 3 million kinds in the 6,543,800,000 books *

1000 bytes/species, about 30MB bytes; Book data is calculated according to each volume, about 100 bytes/volume,10 million volumes * 100 bytes/volume, about 100 MB. There is only catalog data here, but no full-text data.

If it is100000 e-books (one book for each type), if it is a picture version, it will be 10M/ book after compression. .....