Right now, I use a Wolverine Data unit when I am on the road to copy the images off my CF card so that I can start fresh every new day. One of the huge advantages of units like this (to me) is that you can pull the battery from the camera and have it on the charger at the same time you are copying the images off cards (I tend to get to my hotel, drop everything on the chargers, start copying the images off, and go to bed)
I am thinking, given the new card format (XQD), i don't have a way of doing this unless I bring a USB XQD card reader, plug it into a laptop, and then copy the resulting images to a external drive (unless I have a laptop with a huge amount of disk) while somehow leaving the D4 on power while charging its battery
thoughts?