Create empty files using fsutil.exe

I am currently busy with testing BranchCache in a real world environment. I will share more about these tests in another post. Testing BranchCache does mainly consist of copying files over the WAN and monitor how the client cache is being populated and how other clients, that copy the same content from the remote BranchCache enabled server, utilize the distributed cache located on peer clients that reside within the same LAN segment.

Before testing the BranchCache feature with real content, I just wanted to create some large files with different file sizes  on the BranchCache enabled Server.

I’ve seen some freeware utilities in the past that allow the creation of large files, but it can also be done with the out of the box provided toolset from Microsoft. FSUTIL.EXE allows you to create large files on the from the command prompt.

File size Command
10 MB fsutil file createnew largefile10mb.lf 10000000
100 MB fsutil file createnew largefile10mb.lf 100000000
1 GB fsutil file createnew largefile10mb.lf 1000000000
10 GB fsutil file createnew largefile10mb.lf 10000000000


For more information about fsutil go to:

One thought on “Create empty files using fsutil.exe

Leave a Reply

Your email address will not be published. Required fields are marked *