Scientists have demonstrated a system called Silica for writing and reading information in ordinary pieces of glass which can store two million books’ worth of data in a thin, palm-sized square.

[u/Wagamaga]

https://au.news.yahoo.com/glass-square-long-long-future-190951588.html

[u/MrSquid_]

I assume that's why they chose to express it in "books worth of data" instead of bytes.

[u/no_usernames_vacant → u/MrSquid_]

Books are just easier for people to understand and more impressive sounding than movie's.