SHC III wrote:
I was copying some files to a USB Thumb Drive, I stopped and ejected the Thumb Drive. Now, when I insert the USB Thumb drive, it does not show up on the Desktop, or in "Locations" in the Finder sidebar?
Launch Disk Utility and verify the physical drive appears on the left pane of Disk Utility. Within Disk Utility you may need to click "View" and select "Show All Devices" before the physical drives appear on the left pane of Disk Utility.
If the physical drive does not appear on the left pane of Disk Utility, then you have a hardware issue of some sort.
If the physical drive does appear on the left pane of Disk Utility, then run First Aid on the physical drive, then one the Container if it exists, otherwise run First Aid on the volume.
The file "Desktop" does not show in the Finder Sidebar either.
Within the Finder, click on Settings and select the "Sidebar" button and toggle the "Desktop" item until you get a check mark for the "Desktop" option.