Aloha everyone, I'm running Lion on my iMac and my MacBook Pro (see my sig for details) and have few to very little issues as such, at least until today. I have a 2TB external drive (WD) that I use to host my iTunes and iPhoto libraries, as well as other ancillary files I may need at work (I do a lot of Photoshop, unofficially, for my job). This morning, like normal I downloaded podcasts for my drive into work, synced my iPhone, and checked a couple of files on my external via the finder. Once I got into work and plugged everything in, I saw the icon for my external on the desktop, but when I tried to use the finder, nothing showed up under Devices, which is where it normally shows up. Interestingly enough, I get the same behavior when I insert my USB thumb drive (both devices attach via USB). I can navigate to the drives using Cmd-up arrow, but I fail to understand why they won't both show up as normal in finder on my MacBook Pro. I ran Disk Utility to verify the external drive and everything there checked out OK. When I check the system, everything seems to be OK, with the exception that they no longer show up in finder. The first thing I did was to verify that the checkbox to display external drives was still checked, which it is. Does anyone have any idea of where else I can try troubleshooting this particular issue? I really don't think it's a Lion issue, but as that is what I'm using to drive the computer, I thought to put this in the Lion forum. I'm not even sure it's a USB problem, even though only the USB-connected external drives are the ones not showing up in finder. I'm really kind of stumped on this one and would appreciate any and all assistance in resolving this issue.