How do I get root access to delete a few folders

[mdovell at comcast.net]

I use a kindle with the calibre program and calibre needs to recognise a folder on it. Unfortunately what it did was it somehow missed it and keeps creating duplicate folders that cannot be deleted. 

Basically I have a few folders in the /media area that need to be deleted. They do not give me the option of unmounting them. 

In attempting to unmount them I receive the following error 
"DBus error org.gtk.Private.RemoteVolumeMonitor.NotFound: The given mount was not found" 


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