USB/Firewire/DVD drives working but not showing up on my desktop after firmware update

I just updated my 15inch Macbook Pro (early 2011) to the latest firmware patch and now none of my external hard drives, flash drives, or DVDs are showing up on my desktop. I can still access all of the files from the side bar in a finder window (and play movies in DVD player, etc). This was not a problem before I updated my computer about an hour ago.  I already tried restarting it and that did nothing.  I went into disk utility and tried repairing the drives but it claims there is nothing wrong with them.  In sum, everything is functioning properly, but nothing is showing up on my desktop.
Does anyone have any insight as to why this may be and/or any solutions to the problem?

In Finder "Go" menu hold the option key and choose Library. Then go to Preferences trash these two files:
com.apple.finder.plist
com.apple.sidebarlists.plist
Then, restart.(You will have to reset a few finder prefs the way you like them.)

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