Rekordbox exporting extremely slow

Ever since the update to Rekordbox 4.1.2, my exporting speed with a USB 3.0 flash drive is extremely slow. It's taking 3 plus hours to export 30 new tracks. This is the third time in two days I've tried adding a few new tracks and it is taking way longer than it used to. Please help me. This is so inefficient and would be a nightmare if I had to add a few tracks to DJ the day of a show.