How to Generate File of a determinate Size in Windows?

Question

How is the Best and fastest way to do it?

Answer 1

I found this Page, I try it and work great.

To create One File use

fsutil file createnew filename filesize

To create a lote of Files use

or /L %i in (1,1,25000) do fsutil file createnew A%i.tmp 12288

will create 25,000 files of 12288 bytes (12KB) named A1.tmp, A2.tmp, A3,tmp…

Answer 2

PowerShell:

$f = new-object System.IO.FileStream c:\temp\test.dat, Create, ReadWrite
$f.SetLength(42MB)
$f.Close()

This will create a file c:\temp\test.dat that consists of 42MB of nullbytes. You can of course just give byte count instead as well. (42MB = 42 * 1048576 for PowerShell)

Answer 3

c:>fsutil file createnew /? Usage : fsutil file createnew Eg : fsutil file createnew C:\testfile.txt 1000