You've probably heard of HDD and SSD. These are a type of computer hardware. These are called storage devices. These devices are used to temporarily or permanently store data on the computer. This device can be internal, external or portable. Sometimes these devices may be connected to the network.
What is HDD?
Hard disk drive is the full form of HDD. It is a type of magnetic storage device. From the word hard disk it is understood that something like disk or disc is related. Opening the aluminum cover of a modern hard disk reveals that several disks or discs are arranged in several layers. Which are called platters. All information is written to the platter via a magnetic head. Each disc tends to be very thin. The number of discs determines the total capacity of the hard disk. And the features are similar to the name because the discs are quite stiff. Each disc is attached to a powerful motor so that it can rotate at much higher speeds at the same time. A lot depends on this rotation. One of the important ones is the data transfer rate. That is, the higher the rotation, the faster the data transfer. The unit of measurement of this rotation is rpm or revolutions per minute. Typically the current on hard disks now varies from 4,200 to 15,000 rpm, depending on the hard disk.
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