I find that it's easier to just do it thru my iMac via SD card reader. Only time I use the app itself to transfer files is if I need it right away and it's just 1 or two. Otherwise, you would have to connect it to our iphone/ipad via wifi. Kind of a pain for multiple files. As for doing it from your iPad, have you tried using AirDrop? Or what @tiagomota has suggested.