So apparently a 20 TB HDD can be purchased at around $250, plus perhaps $30 per hdd slot with a computer (I just recall a number of this range from calculating years ago how much it costs to have storage at home), making it 2 million dollars—without any redundancy, so maybe twice that.
On the other hand you can already have 24 20TB HDDs for maybe $7000 (with required other hardware), and that's almost 0.5 petabytes. I imagine it would be able to archive all things a single person cares about. Now only if there was a way to interconnect these smaller storage pods to each other..
For the redundancy at this scale, perhaps tape storage is interesting. Though the prices for high density tape seem to not be low enough to be public, and IBM scam their customers by advertising storage capacity before compression.
On the other hand you can already have 24 20TB HDDs for maybe $7000 (with required other hardware), and that's almost 0.5 petabytes. I imagine it would be able to archive all things a single person cares about. Now only if there was a way to interconnect these smaller storage pods to each other..