this post was submitted on 08 Sep 2023
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It gets better. The size of the SD card isn't the storage area. Look carefully at the back of an SD card and you should see how a tiny square area in the middle is a bit 'thicker' than the rest; that's the actual chip, that tiny bump!
SD cards make sense to me. Hard Drives... Now there is some spooky technology.
The reader head on a hard drive changes direction so fast, that it experiences accelerations like that of a bullet being fired, hundreds of times a second.
The "Fly height" or distance a reader floats above the platter is so tiny, that it would crash into a thumbprint.
The actual magnetic media that stores your data is a layer of iron a few atoms thick deposited on to a ceramic or glass platter, with a single atom layer of a protective metal coating (typically rhodium) in top of it.
Despite these incredible tolerances, they damn things are dirt cheap, and surprisingly reliable.