You set import preferences in the General and File Handling panels of the Preferences dialog box. You can also change some preferences in the Auto Import Settings dialog box (see Specify Auto Import settings). Finally, you specify import previews in the Catalog Settings dialog box (see Customize catalog settings).
Show Import Dialog When A Memory Card Is Detected
Allows the import dialog box to open automatically after connecting a camera or memory card reader to your computer.
Select the Current/Previous Import collection during import
Opens the completed import in a collection when the import process finishes.
Ignore Camera-Generated Folder Names When Naming Folders
Tells Lightroom Classic CC to not use the folder names that your camera creates.
Treat JPEG Files Next To Raw Files As Separate Photos
For photographers who capture raw + JPEG photos on their cameras. Selecting this option imports the JPEG as a standalone photo. If selected, both the raw and the JPEG files are visible and can be edited in Lightroom Classic CC. If deselected, Lightroom Classic CC treats the duplicate JPEG as a sidecar file, and the raw file appears with the raw file extension and +jpg.
Import DNG Creation
Choose the type of file extension (upper-case or lower-case), Camera Raw version compatibility, and JPEG preview size for imported DNG files. For more information on DNG files and DNG creation options, see Convert photos to DNG.
Select the options to recognize a period ( . ) or forward slash ( / ) between keywords as designating keyword hierarchies.