This may be already answered somewhere else! But am wondering about time machine, I will hopefully recieve my macbook pro this week, and will be updating to Leopard. I am interested in uisng time machine and considering gettin an external drive for my time machine back ups! I am just wondering what sort of size to get, my macbook pro will have 160gb hard drive, so essentially time machine only uses differential back ups, so i will only ever need a drive with 160gb of space for time machine? is that correct? I have a USB WD 250gb mybook which has music on, am a considering getting a 500gb WD Mybook pro, using that for music pics etc, and using the 250gb for time machine, but would quite like to partion it, if i can, just in case i ever need it! Any one got any suggestions?