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Quicly creating large files on the command prompt

By Johan van Soest.

Published : 2014-01-30.

Last updated : 2020-11-07.

For example use

fsutil file createnew c:\testfs.txt 4294967296

This quickly creates a file of 4GB bytes containing zeros (0x00). Do not compress these files and send them per mail :-)
Read more about this FAT and NTFS tool and a lot more useful options at: https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil(Windows XP or better)
Fsutil is the Windows version of the unix/ linux / bsd command "dd". This example creates a file testdd.txt in the current firectory of 1GB.

dd if=/dev/zero of=testdd.txt bs=1024 seek=$[1024]

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