Do you want to add another file or increase the size of an existing file? Anyhow, both operations
are very straight forward:
ALTER DATABASE db ADD FILE (...)
ALTER DATABASE db MODIFY FILE (...)
You find exact syntax in Books Online. It will take a while to add or grow a file close to half a
terabyte...

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Tibor Karaszi, SQL Server MVP
http://www.karaszi.com/sqlserver/default.asp
http://sqlblog.com/blogs/tibor_karaszi
> sql server 2000 sp4
> Hi
> I have a database that was initially created for 70MB. It has a application
> associated with it and can not be deleted. I need to increase size of the
> database to 440 GB. What is the best way of doing it.