I'd image you would get about 75~80 gb left after windows 8 and the swap being on your ssd.
If you are only worried about moving files and temporary items get usb 2/3 thumbdrive.
Ok, this what I was kinda thinking myself, any idea how much data I can expect to be available off that 128gb SSD after Win8 is installed? Really get afford the extra $ to upgrade to the 250gb. I was kinda expecting to pickup a portable hardrive or dropbox depending on file sizes to move docs between my laptop and desktop.
Also I am looking at warranties, I am gonna get a 3 year accidental damage warranty(anyone know if this includes failure of parts?) Any reccomendations on the warranty I can get on that laptop would be helpful seem to be having trouble navigating their site