But I think, this is not answer for my question?
think again, your answer is already answered
Approach depends database to database.
the database which is being updated very frequently(kind of highly OLTP database), % growth is not recommended. Its better to have autogrowth with fixed size* and unrestricted growth.
if you have disk space available on that drive then you need to modify the autogrowth of your mdf. else need to move files to some other disk where you have sufficient space and then configure the autogrowth as suggested.
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Ashish