Hi, I just visited my local photo printing shop which I usually go to and for some reason The shop owner said he couldn't access the files on my usb because they were put on using a mac and when he opened the file it wouldn't display 😕 He said it has something to do with mac copying the jpegs so it can be viewed on windows. I usually go to that shop I have never had a problem previously on my mac. Any help would be appreciated.