Can't save files to secondary partition except as Admin

[jamsc]

I have a secondary partition on my son's computer's hard drive. Files (any type) cannot be saved to it, unless I open the program I'm using as Administrator, then I can save to that partition. Is there a way to fix this partition so files can be saved to it without needing administrative rights? Thanks.

EDIT:
Just now saw this tutorial here. Will try it out.