This tutorial describes How to create test files of any size in windows.
 
How to create test files of any size
 

Overview

Fsutil is typically used by support professionals. Finds a file by security identifier, queries allocated ranges for a file, sets a file's short name, sets a file's valid data length, sets zero data for a file, or creates a new file.

Key Ideas

Fsutil: File system utility.
File: Finds a file by its security identifier, queries allocated ranges for a file, sets a file's short name, sets a file's valid data length, or sets zero data for a file.

Now Do It

The following Syntax can be used to create a test file of any length. 

fsutil file createnew <filename> <filesize in bytes>
 

For example, to create a 20 megabyte test file:

  1. Click on the ‘Start’ button
  2. In the search box type ‘cmd’
  3. Right-click on Command Prompt and choose ‘Run as administrator’
  4. Enter the following command in cmd:
        fsutil file createnew c:\log.txt 20971520
create test files of any size_cmd


      5. The file will be located in the C:\

create test files of any size_log

I hope you  this information is useful for you. Please forgive any typos or incomplete sentences.