Ok so I was thinking. I know I can use an external hard drive to back up my mac with time machine. What I am not sure about, and I know it isn't a feature offered in Windows Home Server, but if I am not mistaken I can use my MacBook to access Windows Home Server to share my media right? Since it is through my network and all would I be able to just designate Windows Home Server as the location to store my Time Machine data? Incase it crashes I could just rebuild my MacBook through my network couldn't I?