It seems like all my iPhone photos have copied to the flash drive but many of them are coming up black with the word ‘exec’ in green in the left corner. When I attempt to open it, it directs me to the App Store. Do I need another app to open these specific photos?
are you trying to open the photos on a windows computer? if so it is probably related to the new image format iOS uses HEIC. You can go to the iOS settings > Camera > Formats and change it to Most compatible. It will then take the photos in jpg format. for any picture that was taken in HEIC you would need a program that supports that file type or a converter that will convert them to jpg so you can view them on a windows computer.