These flash chips (often dubbed "NAND") are of a different type than the kind used in USB thumb drives, and are typically faster and more reliable. A read/write head on an arm accesses the data while the platters are spinning.Īn SSD performs the same basic function as a hard drive, but data is instead stored on interconnected flash-memory chips that retain the data even when there's no power flowing through them. A hard drive is essentially a metal platter with a magnetic coating that stores your data, whether weather reports from the last century, a high-definition copy of the original Star Wars trilogy, or your digital music collection. That is, information on it doesn't "go away" when you turn off the system, unlike data stored in RAM. The traditional spinning hard drive is the basic non-volatile storage on a computer.
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