Lightroom Classic is a application. It does not store your actual photos; it stores a record of your edits and the location of your files.

: Use these to group photos for specific projects without moving them on your hard drive.

: Use the Library Module to bring in photos. Choose "Copy" to move files from a card to your hard drive, or "Add" if they are already on your drive.

: This update specifically optimized scrolling through the Library Grid and zooming in the Develop module.