Massive file

Does anyone know how to created a large file (20M+) containing rubbish, one that cannot be opened by anything.

There is method in my madness.
A file can always be opened - depending on the editor and the privileges of the opening process.

I assume you want to create a file in windows - based on that, then from a DOS window enter:

fsutil file createnew some_file_name size_in_bytes


fsutil file createnew jj_old_fart 25000000

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