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SSD vs. HDD: Which Do You Need? Are you running out of storage space? Is your old hard disk slowing to a crawl? Then it’s time for a hardware upgrade. But should you choose a cheaper, traditional hard disk drive? Or should you take the plunge and buy a fast SSD ? We show you the differences between HDDs and SSDs in terms of speed, capacity, cost, and lifespan – so you can make an educated decision. SSD vs. HDD: What’s the difference? A hard disk drive (HDD) is an old-school storage device that uses mechanical platters and a moving read/write head to access data. A solid-state drive (SSD) is a newer, faster type of device that stores data on instantly-accessible memory chips. HDDs : An enclosure contains a series of platters covered by a ferromagnetic coating. The direction of the magnetization represents the individual bits. Data is read and written by a head (similar to  the way vinyl record albums work ) that moves extremely fast from one area of the disk ...
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