american scientist has this article about the past, present and future of hard disks
and what will happen when we have 100+ terrabyte disks.

i know it’s a stupid thing to say but, i don’t currently use all of my 100+ gb
of disk space, so what will we be storing. the concensus at work is that file
compression will become a thing of the past as we go for quality over file
size, but i am not convinced.

when i look back on this in 10 years time i’m sure i’ll feel rather silly for
ever questioning the need for so much space.