un recognized usb hd

Martin , thanks for getting back to me and sorry it took so long to get back to you. I couldn't fix my USB problem, I ended up doing a reinstall, and thats where the problems started. About 2 weeks down time and by borrowing my friends computer I was able to get this thing back on line. I didn't realize that a reinstall on a dell did not include All of the drivers that are needed to be up and running. Fortunately the dell web site was able to tell me which drivers I needed. Long story short I ended up learning more than I planned on.
Thanks again, Glenn