Use the Fsutil command to create a file of a certain size in Windows 10.
Sometimes you need to create a file of a certain size for test purposes. Of course you can create it with a third party application, such as WinRAR, by compressing large volumes of files into desired volume rar or zip files, but you know that Windows 10 offers you the ready solution through the Fsutil command;
Windows comes with a special command-line tool, called fsutil. This tool is aimed at advanced users and system administrators. Performs systems related tasks files FAT and NTFS, such as managing mount points, managing sporadic files or removing a volume. If used without parameters, Fsutil displays a list of the individual ones commands which are supported. The tool has been available on Windows since Windows XP.
You must be logged in as an Administrator or a member of the Administrators group to use Fsutil. You may need to enable it WSL mode to have full functionalin fsutil.
One of fsutil's parameters is “file”. Contains a list of subcommands that can be used to find a file with a username (if Disk Quotas are enabled), to find a selected range of files, to set a short file name, for nulls data in a file, to create a new file, etc.
In our case, we will use the fsutil application to create a specific size file in Windows 10. See how.
Step 1: Open a command line with administrative privileges.
Step 2: Type or copy-paste the following command: fsutil file createnew
Replace the part with the actual file name and the desired file size in BYTES.
The following command will create the iguru.bin file with 4 kilobytes size under c: \.
fsutil file createnew c: \ config.bin 4096
Do not forget to put quotes in your file path if it contains spaces.
