Computer A disk and B disk are removable floppy disk, capacity is very small, played the role of hard disk in the computer at that time with no hard disk. When the computer has C disk, especially after the U disk, it gradually replaced the floppy disk. Similarly, when there is a large capacity mobile hard disk, gradually replaced the CD.
Why doesn't the computer have B drive
The B-drive was used a long time ago to mark the five-inch drive.
But it was very early, and only hardcore computer users like us had experienced it. It was a blue floppy disk, very thin, kind of like a record. Unfortunately, I have no physical object in my hand now, so I can't send pictures. That disk has not been used since 1996 in memory, and it is no longer installed with B drive.
However, the habit of setting the drive letter has been preserved until now. So now the system disk of home computer is usually C disk, not without A and B, but after technological change and progress, three inch disk and five inch disk has been eliminated.
Where is the computer AB disk
We're going to turn on your computer, and at first, it's just drive C. You can't find A and B at all? How does this work? Don't disks A and B exist? With that in mind, let's talk about it.
In fact, computers have A and B disks: but they're not called hard disks. They're called floppy drives. In the earliest computer days, hard disks did not appear, but floppy disks as the most important storage medium, they are corresponding to A drive and B drive.
A disk is usually A 3.5-inch floppy disk, and B disk is A 5.25-inch floppy disk. As A result, you can see that in our increasingly modern era, the order goes to drive C because of the need to leave drive letters for drive A and drive B. The main reason for their demise is that floppy disk space is so small: a 3.5-inch floppy disk has just 1.44MB, and a 5.25-inch floppy disk has just 1.2MB.
You can see that in the early days, because the 5.25-inch B-drive was larger and had less memory than the A-drive, the 3.5-inch A-drive survived for A while in the 1990s, while the B-drive disappeared earlier.
However, in the erasable CD, burner, U disk and so on widely used, A disk is more and more not suitable for us to use, until now A disk has become history.
To sum up in a word: their disappearance is only caused by the progress of technology!
Computer C disk full how to clean
Reinstall the system, with shadow Defender lock can, and Internet cafes, maintenance before the network optimization or upgrade, the premise is that you install the system to optimize the system lock can be, the system disk is full of no way to clean up, backup good data after reinstall it, or ghost to backup can, Up TO 30GB OF SYSTEM DISK SPACE IS MORE THAN ENOUGH!!
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