I don't quite understand "Once I have finished editing, I overwrite the changed NEF's on the USB external hard drive with those from the laptop, and copy the relevant processed image sub-folders from laptop to USB external hard drive."
Do you mean that you destroy fghte original (unproced) copies of the NEF files that you placed on the exernal hard drive, and "replace" them with the editied versions in the "processed" folders?
Do you mean that you destroy fghte original (unproced) copies of the NEF files that you placed on the exernal hard drive, and "replace" them with the editied versions in the "processed" folders?
Thank you.