Sometimes while trying to download pictures Lightroom will not download all of the pictures. All previous pictures were removed to a backup storage device. Tried to download yesterday and got errors that not all pictures were downloaded. Tried today and was notified that I do not have enough space and have to empty Lightroom of pictures. Should mention that after 13,500 pictures that I am out of room. Only had 605 pictures to download. Brought it in to a computer repair shop 8 days ago and don't have any viruses. Brought it to an Apple store yesterday and still can't download pictures. They either end up a grey screen or won't download many pictures when it feels like downloading. Tried removing the program and reinstalling it to no avail. What the heck is going on? Thanks for any help.