So, when I ordered my macbook on tuesday I also ordered a 320GB 7200 RPM Segate from NewEgg, and it came as a combo with an enclosure, so I tought to my self great I`ll use the 160GB in the enclosure and attach it to my router Asus WL500G P which has 2 USB 2.0 ports and the enclosure is just USB no power or anything. So when I attached it to my router nothing it doesnt see the drive and I hear strange clicking, so I said to my self hmm bad drive another trip to Apple store..... But just in case I tried it in the MacBook it self and it was fine, so then I tried with enclosure and setup TM for it, to my surprise it did all 20GB time machine with no problem, so I went and attached it to my Windows XP machine and clicking again and drive is not mounting... Whats going on here ? Is this thing only works with MACs ? Is the enclosure bad ? Any help is appreciated. Thank you.