Apart from that, you can also set file type (say TXT, PDF, etc.) or file extension to create your test file. How to create large size dummy files in Windows 11/10.

I need to create an outlook PST file that I can have emails in with attachments. I will then send the PST file via email to test my system's Data Loss Prevention software.

To test it, in the Finder go to the folder where you want to create a new file. Control-click on an existing file within that folder and select Create New File from the Services submenu. A dialog ...