Currently Being ModeratedSep 12, 2012 7:04 PM (in response to Zimmer1956)
WD electronics in their external drives don't have a very good reputation, so another brand might be a good idea. I like OWC drives as many of them use Oxford chipsets as well as multiple connections like USB and Firewire (I prefer a Firewire connection). Some examples are this or this.
I use a BackPack to get my external drive off the desktop, which is a handy way to mount it.