Culling Photos. How to get rid of duplicate/embeded photos

Suggestions:

First, you can press X (mark as Reject) rather than rating an image "1". Lightroom automatically 'dims' rejected images or shows readymade buttons to hide or show those. Also Lightroom provides a convenient one-click function to delete all images that are currently marked as rejects, when you are ready to do that

Second, you can "cull" right in the Import screen if is a matter of obviously unwanted shots. Avoiding importing those in the first place, streamlines multiple aspects: the quantity to be copied off the storage card, preview-building, the space consumed in the computer temporarily, your time organising, rating, reviewing and culling, then deleting these photos from Catalog and from disk, and finally OS cleanup.

Third, if your camera is set to shoot Raw+JPG, and if your LR is set to "treat JPGs next to RAWs as separate", then you will see two separately treated images in LR, from each click of the shutter button.

For the future:

• Changing the camera to shoot Raw only (if available), means only a Raw will have been saved to the card in the first place.
• Changing the LR setting so JPGs next to Raw files (i.e., in the same folder and with equivalent names) are no longer treated as separate, means that if a Raw+JPG pair has been saved to the camera card, LR imports hereafter will treat the two as a single entity. As if it was just a Raw file, in effect. LR will continue to import and show JPG files as usual, where those are not accompanied by an equivalent Raw coming from the same shutter click.

Fourth: while LR generally speaking resists importing two instances of the same photo, it is possible to persuade it to do so. These two instances may reflect some unintended change of location etc, whereby images that had already been imported living at disk location 1, were subsequently believed to have gone astray, and then re-imported as additional library entries, living at disk location 2. Such re-importing takes quite a bit of sorting out: the way to know whether this has happened is to take two adjacent instances, and investigate where each one is physically stored using "Show in Finder" / "Show in Explorer". Sometimes such instances happen because Location 1 has become inaccessible. The correct fix for that, if that happens, is not to reimport at location 2: it is, simply, to "tell" LR that whatever was previously to be found at Location 1, is now to be found at Location 2 instead. That redirection becomes more difficult to do, once you have got pictures imported from both Location 1 and Location 2.