I want to unhide files on my external hard drive that used to be used for windows

I have a Western Digital external hard drive. I was using it with a windows 7 computer and had certain folders (and their contents) marked as hidden. I have now upgraded to a iMac desktop. I am using Mountain Lion OS X 10.8.4. I used online instructions to use "terminal" to show all the hidden files. However, I want to change these files back from being hidden but I can't find how to.

Applications > Utilities > Terminal
chflags nohidden /path/to/the/file/to/change
See the chflags manual page for more info
man chflags

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