SSDs are consequently more expensive than USB thumb drives. That’s the subject of a totally separate technical treatise, but suffice it to say that the flash memory in SSDs is faster and more reliable than the flash memory in USB thumb drives. These flash memory chips differ from the flash memory in USB thumb drives in the type and speed of the memory. The chips can either be permanently installed on the system’s motherboard (like on some small laptops and ultrabooks), on a PCI/PCIe card (in some high-end workstations), or in a box that’s sized, shaped, and wired to slot in for a laptop or desktop’s hard drive (common on everything else). A read/write head on an arm accesses the data while the platters are spinning in a hard drive enclosure.Īn SSD does much the same job functionally (saving your data while the system is off, booting your system, and so on) as an HDD, but instead of a magnetic coating on top of platters, the data is stored on interconnected flash memory chips that retain the data even when there’s no power present. That coating stores your data, whether that data consists of weather reports from the last century, a high-definition copy of the Star Wars trilogy, or your digital music collection. Hard drives are essentially metal platters with a magnetic coating. That is, it doesn’t “go away” like the data on the system memory when you turn the system off. The traditional spinning hard drive (HDD) is the basic nonvolatile storage on a computer. But how do you choose? We explain the differences between SSDs and HDDs, and walk you through the advantages and disadvantage of both to help you come to your decision. Now, you can configure your system with either an HDD, SSD, or in some cases both. Every other desktop or laptop form factor had a hard disk drive (HDD). If you bought an ultrabook or ultraportable, you likely had a solid-state drive (SSD) as the primary drive (C: on Windows, Macintosh HD on a Mac). Until recently, PC buyers had very little choice for what kind of file storage they got with their laptop, ultrabook, or desktop.
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