Create and delete folders with names ""

Windows has a BUG! It is to create a file shelf in a special way under DOS. It cannot be deleted directly !! A window will pop out, prompting "the system cannot delete files: the source file or disk cannot be read ."

The procedure is as follows:
1. Create:
Open "run" -- CMD -- to enter the DOS window. Enter the MKDIR command. (MKDIR is the creation command !)
Column: MKDIR d: \ A .. \ indicates that A file shelf "A." is created under drive d!
According to the syntax rules of the doscommand, the created file name is "..\". However, the declared file shelf name is "A." With one point missing and A backslash.
The Backslash "\" is the path Separator in windows. For example, "C: \ Windows \" means the Windows folder in the C partition, and the "cmd.exe" file in the Windows folder in the C: \ windows \ cmd.exepartition C.
What if the file name contains the "\" symbol? Assume that "A \" is the name of A file, which is in disk D: "(D), the path is D: ", when we try to access this file, Windows will mistakenly think that the file we want to open is the folder of partition D, so that Windows cannot be opened and an error will be returned, because the preceding path does not exist.
Of course, you are creating A "A" file, but Windows will prompt that the "\" symbol cannot be used as the name of the file or folder.

Ii. Delete:
Open "run" -- CMD -- to enter the DOS window. Enter the RMDIR command. (RMDIR is the DELETE command !)
Column: RMDIR d: \ A .. \ means to delete the "A." file shelf under drive d!
If the file contains A file, you cannot delete it with RMDIR d: \! A warning dialog box with a Red Cross will pop up, saying "... Reference an unknown ...... Please confirm that the disk is correctly connected ......" Cloud.
However, you only need to add a parameter after the deletion.
The example is 'rmdir/S folder name '.
This S means that no matter whether there are any files in it, it will also be deleted.
3. Add files:
Open "run" -- CMD -- to enter the DOS window. Enter the copy command. (Copy is a copy command !)
Column: copy d: e d: \ a .. \ It means that the "e" file on drive d is taken to the "a." file on drive d!

Iv. role:
Hard Disk bomb:
In fact, this also uses the principle that ordinary people do not know how to delete these folders, compile a program (virus or batch processing), create one or more such folders, and then copy something to them, the bigger the better, the smaller the hard disk in the host computer ...... Until No.
Hide:
This folder also has a feature, that is, no matter how many files you put in, it always shows that the file size is zero, but in fact it actually occupies the hard disk space, so it is easy to hide.