Hard disk drives are a form of magnetic storage commonly used as the primary storage devices in a computer system.
They have a large storage capacity and are reliable as they have a long lifespan.
However their read/write time is slow compared to SSD, can be easily damaged by knocks and are not particularly portable when compared to alternatives.
Solid state drives are a form of flash storage often used as a portable storage device with a large capacity. They’re also used commonly as primary storage in mobile devices, laptops & recently desktops.
They have fast/read write speeds compared to HDDs, consume less power than HDDs and are not easily damaged by knocks.
However they are comparatively expensive compared to HDDs and as such generally have a lower storage capacity. They also have a limited number of writes.
USB flash drives are a form of flash storage commonly used for transferring data between different computers, as well as to backup our files.
They are very portable, are durable to knocks and are very compatible with devices.
However they are easily lost, have a limited number of writes, and a comparatively low storage capacity.
SD cards are a form of flash storage commonly used in digital cameras, as well as in mobile devices like smartphones.
They are very small and portable, and are also reliable as they aren’t easily damaged by knocks.
However they have a relatively small capacity and there can be some issues with compatibility.
Optical disks, like CDs, DVDs & Blu-Ray, are a form of optical storage commonly used for storing music, films, tv & software, for distribution by suppliers.
They are compatible with most personal computers and are highly portable.
However their storage capacity is relatively small and they can be easily damaged
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