I do a lot of image processing on my 1TB iPad and LR CC. I usually transfer images from a card reader. However, with the latest OS, I can connect my GRIII directly to the iPad with a USB-C to USB-C (or thunderbolt 3) cable and import directly into LR CC on the iPad. Images transfer pretty quickly. LR CC now has new export sizing features allowing me to post directly to FM in a suitable format. Pretty slick . . .