Windows 10 – How to generate test files of any size

The following Command Prompt command can be used to create a test file of any length.

fsutil file createnew <filename> <filesize in bytes>

For example, to create a 10 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. 
5. Enter the following command:

6. fsutil file createnew C:\TestFile.txt 10485760

7. 
8. The file will be located in the C:\ directory.