Why are there 1TB micro SD cards that are the size fingernail and most 1TB hard drives are bigger than my hand?
In: Technology
A MicroSD card has very limited throughput (read and write speed) compared to a proper disk drive. A really good SD Card can write about 30 MBytes per second. A hard drive can achieve 100MBytes to 200MBytes per second. And a solid state drive can do 500MBytes per second.
So SD Cards are small and cheap, but slow and not robust. Hard disks are cheap, moderately speedy, and robust. SSDs are robust, relatively expensive and very fast.
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