I'd create the required folders anew, then open each of your folders under Trash, select all (ctrl+a on a PC, not sure about OSX) and use right-click (sorry, OSX again, does it have a right-click?) and select Move To, then navigate to the appropriate folder. Alternatively, you can just drag and drop the selected messages, but it's just slightly more prone to hiccups. I always avoid trying to drag and drop the folders themselves. It is, IMHO, an undocumented feature and it's not clear (to me, at least) what will actually happen. Does charter's server oblige you to create all your new folders under Inbox as subfolders? Some do, most don't.