I would like to ask some clarifying questions :
1) Are we looking into video storage for nest camera?
2) what is the time frame we are looking here for storage calculation?
3) Are we calculating across world or just US?
1. We are looking into video storage only
2. Restrict calculation to 1 yr storage and US only
Equation = % of household using nest * storage for a day * no. of days of video stored in an year * no. of nest cameras per household
Let's calculate each part of equation separately -
Since the camera is expensive which $300 dollar each + storage cost, not everyone can afford it
minimum = 1 house hold; max = 50M household;
% of household using nest = 5% of 100 = 5M
Generally people who use camera security install 2 cameras ; one for outdoors and 1 for indoors
no. of nest cameras per household = 2
For storage; since security camera video ~ YT video by size ; 4 min YT video = 160 MB
1 hour of Video = 160/4*60 = 2400MB ~ 2.4 GB
Nest has 5 days/10 days/30days 24*7 pricing model for video storage
on an average people use 12 days of storage 24*7 per month (geometric mean of 5 and 30)
Final storage computation in an year = % of household using nest * storage for a day * year * no. of nest cameras per household
= 5 M(% of households) * 2 (no. of cameras each household) * 2.4 * 24 GB (GB per hour * no of hours)
* 12 (only 12 days rolling video is stored for the user in an year)
= 6912 * 10^6 GB ~ 7000 PB in an year
the number seems a little high, reasons for this:
1) the % of household using nest is high
2) video quality might be a little low for nest devices compared to YT videos