hey guys, ok just to start things off, i have 2 comps. one main PC for gaming and everything else, and my macbook for uni and entertainment. i have an external western digital 300gb drive for my PC already, and i recently bought another USB powered western digital 250gb 'mypassword' harddrive. (http://support.wdc.com/product/download.asp?groupid=205&lang=en) the initial plan was to use that as a Timemachine Backup drive, so i got home opened it, and plugged it straight into my macbook. i set it as my timemachine back up drive and let it do the complete first backup for a few hours, so now its fine, ive tested it and its amazing. The thing is i then go to transfer a few files that i only have on the PC to my macbook and windows couldnt regconise the new USB powered hard drive, so i googled around and realised timemachine will take over the entire drive. so i erased the data through disk utility and partitioned it into 2 seperate partitions (both volume format are 'Mac OS Extended (Journaled)', 170gb for TM and rest for Data storage. so now i timemachined it onto it again and test storage drive. both work on the macbook, but now on the PC it doesnt get picked up again. so i later found out again that the volume format should be MS-DOS for the one that i need for both PC and Mac. now i redo everything again with the storage partition MS-DOS, it still doesnt work. i've downloaded the drivers for the hard drive for the PC. it is still not working. Do i have a dud harddrive?? it saids its compatitable for both vista and Mac on the box packaging tho. maybe i shouldve plugged it into the PC first? >_< anyhelp would be greatly appericated.