administrator in windows

hello and sorry for my bad english
i cant delete file in my nas networkspace 2 because i havent got the autorisation
its user unix/999
i want delete or write everything on my nas in windows
a solution ?
thank you
i cant delete file in my nas networkspace 2 because i havent got the autorisation
its user unix/999
i want delete or write everything on my nas in windows
a solution ?
thank you