Storage devices are the devices used to store the data. These are used to transfer or copy data from one device to another. The following storage devices are arranged from smallest to largest memory capacities.
Floppy-disk is one of the oldest digital storage. These are read and written by Floppy Disk Driver (FDD). These are very slow. The storage capacity of floppy disk lies between 80 KB to 1.44 MB. Which is very low as compared to today’s storage devices. Floppies are made only to store text files not graphical files.
CD’s or DVD’s are next generation experiment to the storage devices. These are very popular in 90’s and 20’s. But they have major problem of scratch.
A scratched CD or DVD is hard to read and write by DVD writers. The storage limit of these is lies between 256 MB to 64 GB. DVD are first which gives maximum external digital storage. It is also first famous for media storage devices.
Pen-Drive is a kind of latest digital storage. It is more reliable, easy to use, smaller in size, faster, and has larger storage than floppy-disk. The storage capacity of Pen drives lies between lies between 1 GB to 512 GB and some companies has announced that they are going to launch 1 TB data storage Pen drives.
Hard-Drives are the storage devices used to store larger units of data. Hard drives has high capacity memory storage. Hard drives capacity lies between 128 GB to 4 TB.
# Human Brain
Human Brain is one of the ultimate natural storage device. An average human brain can store more than 300 years of continuous video. Although Human Brain store more than 2.5 petabyte (i.e around 2621440 GB). Which is enough for store the life time activities of a person. Human brain is able to store large amount of information.
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