So you came back home from that wedding with 1500 photos from you D750. Just compress all of them while having a cup of coffee to save somewhat 21GB on your disk. Normally what you do next is import it to your Lightroom which takes a lot of time, but not anymore. Because each of your picture is now so much lighter, they get imported in a breeze. What's even more cooler is that your laptop won't get hot while editing.