[low_battery]

To store 100PB, one can always buy 50.000 hard drives. Would only cost $2-3 million of initial payment. I wonder how much maintenance would cost to provide same availability with near storage.

[dekhn]

Don't forget the full-time admins and hwops people. Operations costs are going to dwarf the capital investment.

[rugmug5]

Or you could leave it in the cloud where it already is and not transfer it to Google's cloud. I wasn't suggesting building your own...