de hecho ya estan hablando de PB algunos para que se rentable  no me gusta copiar y pegar pero no queda remedio As of March 2015, they wrote about Storage Pod 4.5 - Tweaking to Proven Design. The lowest cost form is at 180 TB in a 3RU rack at $ 0.048 / GB. 5PB would need 28 of these 180TB units at $ 8713 each (which would give you 5.04 PB), for total of about $ 244,000.