I have imported files into Lightroom (using copy) from an external drive. Later,after I had added a day's shoot to the drive, I wanted to import files from that drive again, but I didn't want to duplicate the files that had already been imported. Even though I checked the box next to "Do not import suspected duplicates", Lightroom still wanted to bring in all the files on the disk. The folder names (of individual days) and the file names had not been changed, and even appear identical in the Lightroom catalog, and yet Lightroom still doesn't see them as duplicates. In the past, if I proceed it duplicates the image files in the catalog and on the drive.
Does anyone have a solution how I can make Lightroom TRULY ignore duplicates?
When deciding duplicates, LR looks at the file name, file size, and creation date.
Any chance you have some LR settings turned on where LR writes data back to the original files?
"When deciding duplicates, LR looks at the file name, file size, and creation date."
That is correct; yet I don't have LR writing anything back into the original file. I use sidecars for my raw files. I will check on this further but I have never set anything up to write to the RAW files. I will also check on the dates - when the files were created, they were then backed up to external drives, and that drive is what I'm using to import from. but creation date should be the same, non-changing, unlike modification date...