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Access Time

SSD has access speeds of 35 to 100 microseconds, which is nearly 100 times faster. This allows programs run more quickly, which is very important, especially for programs that access large amounts of data often like operating system. Meanwhile, a typical HDD takes about 5,000 to 10,000 microseconds to access data.



In terms of price, HDD is cheaper than SSD. This is why most computers with an SSD only have a few hundred gigabytes of storage compare to SSD. Computers with an SSD may also have one or more HDDs for an additional storage.



The SSD has no moving parts. It uses flash memory to store data, which provides better performance and reliability over an HDD. While HDD has moving parts and magnetic platters, meaning the more you use it, the faster they wear down and fail.



Although there are large SSDs, anything over 1 TB SSD is usually outside of most people’s price range. Several terabyte hard disk drives are available for very reasonable prices.



The SSD uses less power than a standard HDD. It means a lower energy bill over time and for laptops, an increase in battery life. HDD uses more power than an SSD because all of the parts required to spin the platters.



With no moving parts, SSD generates no noise while with the spinning platters and moving read/write heads, an HDD can sometimes be one of the loudest components in your computer.



SSD is available in 2.5″, 1.8″, and 1.0″, increasing the available space available in a computer, especially a desktop or server. HDDs are usually 3.5″ and 2.5″ in size for desktop and laptops respectively, with no options for anything smaller.

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Because there are no moving parts and due to the nature of flash memory, the SSD generates less heat, helping to increase its lifespan and reliability. While in HDD, with moving parts comes added heat which can slowly damage electronics over time, so the higher the heat, the greater the potential for wear and damage.



SSD is not affected by magnetism. For HDD, it relies on magnetism to write information to the platter, information could be erased from an HDD using strong magnets.

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