FWIW: Mine says to format it before you install it into the case... (These instructions came with the case...) Rick Glazier CC: From: "Lester Proctor" > I have added a larger hard drive in my removable hard drive case. I need to format the HD so my computer will recognize it (it would be D: drive). I know I need to download an boot disk, but how do I get it to "format D:"? The NOSPIN Group Promotions is now offering Mandrake Linux or Red Hat Linux CD sets along with the OpenOffice CD... at a great price!!! http://freepctech.com/goodies/promotions.shtml