I just purchased Apple's "Lightning to SD Card Camera Reader" for my iPad Pro 10.5 and have conducted some tests. I started out by copying 393 files from my camera SD card to my desktop computer just like I always have. I then plugged the SD card into the iPad adapter and told it to import all of the pictures. I then connected the iPad to my desktop computer and examined the files imported. It turns out that 3 files were not copied to the iPad. I repeated the experiment 3 times and the same 3 jpg files were missing from the import each time. They occurred in random spots and were not sequential. There was nothing special about the missing pictures. They were just like the pictures on each side of them in the sequence, shot within seconds of each other. I compared the 390 files that were successfully imported to my reference copies and they compared perfectly. Is there any particular reason that the iPad would skip importing particular jpg files?