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The NSA is building an indoor area of ​​92,903 m2 as a storage hard drive and costs about 2 billion dollars. The plan of this place will be able to store data at 1 Yottabytes predicted will be realized in 2015.
Well, certainly in question Yottabytes right? How much does a Yottabytes it?

- 1,000 Gigabytes (GB) = 1 terabytes (TB)
- 1,000 terabytes (TB) = 1 petabytes (PB)
- 1,000 petabytes (PB) = 1 exabytes
- 1000 Exabytes = 1 Zettabyte
- 1,000 Zettabytes = 1 Yottabytes
How, they already know now how does one Yottabytes? That certainly might be able to store all data that exist in this world.
Hard drive of that size would also be making us hard to imagine how much it takes to reach that capacity if they use the hard drive capacity of 1 TB per piece. If calculated they would use about 1,000 billion hard drives. (Gile really ...!)
But from what we read, most likely the NSA uses a much larger hard drive since the NSA always use the most advanced technology that is usually not in the market like they could use a hard drive with a capacity of 25 -100 TB per piece.