As computer users, we are accustomed to storing data to retrieve it sometime in the future. Today there are many ways to do this. If you take a photo on your cell phone, it’s going to be saved into the phones internal
flash memory (or an external flash card). If you have a modern computer it’s likely that you have a
Solid State Drive (SSD). It’s also possible to save your data in the “
cloud”. So, why focus on Hard drives?
Hard Disk Drives (HDD) have been a reliable way to store data since the 1950’s. Cloud providers (AWS, Azure, Google Cloud) have HDD offerings that are cheaper than the SSD alternatives. At the time I wrote this article, if I want to buy a 5TB HDD, I would have to pay around $100 USD; if I want to buy 5TB SSD I would have to pay around $500 USD. For this reason HDDs are still widely used.