Currently I've always used windows PCs and even tried playing around with a few different linux distros but I've always been curious to get a Mac and try it. Of course my current situation is that I have over 110GBs of files on my windows pc that I'd like to not only back up but also use the same drive to trans some of the information(maybe later all of it) to my new MacBook I plan on getting. What format would the external hd have to be so my PC is able to read/write to it and so that I can pull files from it to my Mac? Or is it even possible I could have it set so it can be read/written to from both my PC and the Mac? My other question is when I do get the MacBook I plan on also getting a wireless router, with that, could I hook my external hd up to it (usb only I guess?) and read/write files across the network to the hd?