I have a student with a Sony DSLR (A330) who has problems importing files to Lightroom 5.6 on our Macs. They are copied very slowly, and some don't import at all. He says he has no problems with importing files on his PC at home. When copying the files directly to an external HD (FAT32, NOT Window NT), he has the same problems adding the files to his LR catalog. Any ideas?
If the student isn't using a card reader, I would suggest doing so. Other than that, the problem suggests there might be some hardware issues.
They are using a card reader, and the USB slot in an iMac. It turns out that they have downloaded the cards first to their PC at home, then brought the same card to class to import to their LR catalog on their external HD. Could here be something happening to the files to make them unreadable when the cards are downloaded to the home PC?