Hello. I am trying to download 1600 edited photos to a 16GB flashdrive. It seemed to be working fine, but it is stuck at photo 1120. It has taken hours to get this far and I have a client waiting for the photos. I am using a Mac and the colored ball is just spinning. The rest of my computer seems fine. If I force quit Lightroom will I have to start downloading/exporting from the beginning? Any way to just put the 1120 photos on the flashdrive and then add the rest? Thank you!