Dummy files can be used for anything from fooling your friends to testing your application/network speeds. You can explore to create dummy files using a tool called Dummy File Generator.
Dummy File Generator can be downloaded. Once you launch the Dummy File Generator software, a window will appear asking you to specify the size of the dummy file. You can specify it in bytes, kilobytes, or vene in MBs.
Note: This tool helps you to check the exact file size to be uploaded during testing. This tool helps you to create document type format only.
If it is not downloaded properly, either copy the code into hta file or right click->Save link as