I’m kinda curious as to why everything hasn’t just shifted over to these tiny, affordable little guys. They can have so much on them!
In: Technology
SD Cards are generally made with the NAND chips that fail to pass the quality control checks for SSDs. They generally have really slow read and write speeds due to being a single NAND chip and they do not have much in the way of longevity when it comes to writing data due to how NAND degrades with writes and a complete lack of wear leveling.
SSDs on the other hand, despite being based using the same NAND technology, have a controller which handles things like wear leveling and communication with multiple NAND chips at the same time to vastly improve read and write speeds. The addition of DRAM caches helps to improve read and write speeds even further as well as providing scratch space to use for wear leveling techniques. Capacitors add in loss of power protection to help prevent data corruption when power is lost mid-write.
In other words, SSDs are far superior to SD cards when it comes to reading and writing data and will last much longer when doing so. SD cards are useful to storing data that isn’t required to have constant reads and writes and is easily removed to transfer the data. They will never replace each other while we still use NAND technology.
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