I want to be able to do small edits to photos. Will I be able to edit these photos using an external drive once IPAD IOS is released? Or will I have to have the photos on the IPAD to be able to edit them and then save them back to the external drive. I'm trying to figure out how much storage space I will need on the new IPAD pro given that I have large Sony files. Even if I can edit the photos from the external drive, I still have to have a way to get the photos to that drive without having another computer with me. Thanks for any help you can give.