I think the article writer is getting confused with the units. Besides making a typo at one point, using Gpbs, they use the abbreviation tB - lowercase t. Possi

I think the article writer is getting confused with the units. Besides making a typo at one point, using Gpbs, they use the abbreviation tB - lowercase t. Possibly in the original report, it was Tb - ie Terabit - ie 60Tb = 7.5TB which sounds more likely.