My neighbor wanted an iPAD, so I did some research on that question.
The answer always came back, "email it".
Even though it's the iPAD, which is the hardest system to use of
all, you can get it to work over usb wire and bluetooth. It's just a
PITA because Apple doesn't want you to be able to use other devices
so they make it hard on purpose.
The users all are brainwashed to think it's a "security" thing, but
that's BS. There's no need to prevent wire transfers, especially
since you can set the security in bluetooth any way you like.
So what you have to do is find a non-Apple app that accepts files
(pretty much all the Apple apps are useless anyway) and then you
just put the file in the private space of that non Apple app.
I do it with usb but I've never tried it with bluetooth, which seems
like the easiest way to do a file transfer at home.