What is the approximate capacity of a 20GB hard drive?

A 20gb hard drive has a capacity of about 20 billion bytes. According to the conversion formula "1GB=1000MB=1000*1000KB=1000*1030*10008", the 20gb hard drive capacity can be known.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

A 20GB hard drive represents a capacity of approximately 20 billion bytes.

Hard drives include solid state drives (SSD), mechanical hard drives (HDD), and hybrid hard drives (HHD, a new hard drive based on traditional mechanical hard drives).

SSD uses flash memory particles for storage, HDD uses magnetic discs for storage, and a hybrid hard drive is a hard drive that integrates magnetic hard drives and flash memory.

The capacity of a hard disk is measured in megabytes (MB/MiB), gigabytes (GB/GiB) or terabytes (TB/TiB). The common conversion formula is: 1TB =1024GB, 1GB=1024MB and 1MB=1024KB.

However, hard disk manufacturers usually use GB, that is, 1G=1000MB, and Windows systems still use the word "GB" to represent the "GiB" unit (converted to 1024), so we can change it in the BIOS or When formatting a hard drive, the capacity you see will be smaller than the manufacturer's nominal value.

The capacity index of the hard disk also includes the single disk capacity of the hard disk. The so-called single disk capacity refers to the capacity of a single hard disk platter. The larger the single disk capacity, the lower the unit cost and the shorter the average access time.

Generally speaking, the larger the hard disk capacity, the cheaper the price per byte, but there are slight exceptions for hard disks that exceed the mainstream capacity.

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