1947lark wrote:
i have a similar problem.
in Leopard, the external drive would appear in the Finder under Devices.
when i upgraded to Snow Leopard, that icon disappeared from the Finder.
Assuming you mean a directly-connected external HD (USB or FireWire), it should still appear. Go to Finder > Preferences > Sidebar and check the External disks box. If it's already checked, remove the check, then put it back.
(i tried to insert a screen grab here, but i can't figure out how to make it small enough to be allowed.)
Don't get the whole screen; use Shift+Cmd+4 -- that puts a "target" on the screen that you can use to outline a rectangle and grab just that portion.