60 * 24 * 365 * 100 * 10 * 0.15 / 1000^3 * 0.03 * 12 = 0.02838 So, you mean cost per year? Note that S3 is extremely expensive. Pure storage media cost with h

60 * 24 * 365 * 100 * 10 * 0.15 / 1000^3 * 0.03 * 12 = 0.02838 So, you mean cost per year? Note that S3 is extremely expensive. Pure storage media cost with hard disks is around 0.001 USD per GB-month unreplicated--and replication might not necessarily be a priority, depending on the goals one has with that data collection. Also, that would give you about 1 m precision at one second intervals, which might be excessive (or not). Really, there is no longer an economic barrier to storing "real" (as in "non-meta") data. 24/7 audio recording in telephone quality with ten year retention would cost about 4 USD/year in pure storage cost at current prices per person. Or in other words: storing all phone calls forever doesn't really cost anything. Actually, it's so cheap one can expect that the NSA is already doing it.