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In the past when I have plugged in external hard-drives they would always show up on the desktop. I'm not sure if it is because of a software update or the drive itself but it's no longer showing up.
The drive is working because if I go to Finder I can access the drive.
How can I change the settings so that drives show up on the desktop when they are plugged in?
I'm using OSX version: 10.7.3.