Hi. I've got to reformat as I've got problems causing me slowdown in game. Is there a folder or something that holds everything I need to just put on an external HD, so I can just move that back and forth and play? Or do I need to re install the entire client again and download the patches?

If it is possible to just copy the files/folders I need and start back up without re install, if so, what are they? Sorry I'm very bad with computers.

Thanks.