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I know one especially avid photographer who just snaps and dumps, snaps and dumps, without ever naming or organizing anything. Don’t try to select too many at one time-a single mistake and they’ll all be deselected. You can select duplicates one at a time, or in batches by Ctrl + Left-click or other means.
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The preview pane helps verify that they are the same size, and the same image. Simply searching in my main photo and video folder and sorting them by size brought up numerous duplicate files. The preview pane will morph into a details pane if you press Alt + V, then D. Details view lets you easily see the size, creation date, and more, and in conjunction with the preview pane (Alt+P) can make quick work of removing duplicates.
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