New to Lightroom and no problems until this evening. Was trying to import photos from an SD card. Inserted card and clicked "Import". Import screen appeared. I selected the images I wanted to import. Forgot to click the "Import" button at bottom of screen and ejected SD card. Now, Lightroom shows the preview images but the underlying file is nowhere to be found, presumably because I ejected the disk. Makes sense so far. But, when I reinserted the SD card and tried to import the same photos, "This photo was already imported" pops up when I try to select the photos for import. Any ideas where on my hard drive I should look to locate these "already imported" photos?
Go to the Library Module. In the left column click on Previous Import. Right click on one of the photos and choose "Show in Explorer."