One very good place (U.S.A.) is newegg.com. There are step-by-step instructions at the Apple web site. It is easy to install, but I recommend purchasing a long-shaft Torx wrench set. I think you need a #8 and a #10 (it has been so long since I installed any drives in my Cube that I forget now--maybe a #8 is all you need). Home Depot sells a nice set for about US$20. --Steve At 4:19 PM +0200 5/24/04, Torkill Lademoe wrote: >where can i buy this disk "80Gb Seagate Barracuda IV" for a low cost? >AND is it pretty straight forward to install?