Solid State Drive
A relatively recent invention, Solid State Drives (SSD) are a fast permanent storage device. SSDs use flash memory to store data quickly. SSDs are much faster than hard disk drives but are slower than main memory. SSDs are also more expensive than hard disk drives on cost per-gigabyte basis.
Because of their high cost SSDs aren’t as common as Hard disk drives. But prices are dropping fast and that should increase SSD adoption rates. SSDs usually come in 2.5″ form factor that requires the use of an adapter to get them to fit in a computer case. Some computer cases come with adapters built into them for SSDs.
SSDs do not have any moving parts in them so they make no noise whatsoever. This is another differentiating factor that separates SSDs with HDDs.
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