### Storage

Friday, March 27th, 2009The Apple ProFile hard drive held 5 or 10 megabytes in 11.15×43.89×22.38cm = 10952.17893 cubic centimeters.

A microSD card is 1.5×1.1×0.1cm = 0.165 cubic centimeters and can hold up to 16 gigabytes.

If you stacked up enough microSD cards to fill (as closely as possible*) the volume of a ProFile, you would have 29×20×111=64380 cards totaling 1.03008 petabytes (1030.08 terabytes)—206,016,000 times the capacity of the hard drive you’d displaced (assuming the 5 MB version).

Also, the ProFile cost $3499 in 1981 (about $8194 in 2008 dollars), whereas a 16 GB microSD card costs about $70 as of March 2009. If you somehow bought enough 5 MB ProFiles to make up the difference in capacity (3200 of them), at the original MSRP, you would spend $11,196,800 (about $26,222,014 in 2008 dollars).

(I used Robert Sahr’s inflation conversion-factor tables to convert to 1981 dollars to 2008 dollars.)

* It’s possible that you could fill out the space a bit more by standing some cards on edge, but I don’t feel like doing that much multiplication. ↶