The plugin mentioned (from Jeffrey Friedl) is 'donationware' so you can make a payment of any amount to him via PayPal. The resulting PayPal transaction ID is your plugin registration code, good until your Lightroom serial number changes.
Lightroom is not a browser like Bridge is or Windows Exlorer or Apple Finder. It does not show you all contents of a folder automaticaly.
The structure you want can be accomplished without draging or reorganizing. Just set up the importpreset (under destination).
Today Puget systems has made available a free benchmark for testing Lightroom Classic performance on Windows computers: