Ok, so I'm running Windows Vista Basic on an Acer laptop. This laptop came with two hard drives ..."C" which it is using, and "D" which it calls a data drive........what happens when "C" runs out of space, does it have something in the software to automatically start running on "D", or is there something I need to know about this BEFORE it happens? And no, my book tells me nothing about it, lol! Thanks guys!