If you can burn a hard copy I would advise just sending it in.
Same position as you Dan, just under 15gb of stuff after three years of madness lol. I figured the best way was just just get a usb stick off amazon and ship it off. They have come down in price a hell of a lot, I bought a 16gb stick for £9.99 inc postage.
Takes about a week to get from here to Skot so if you want to go with that option it's got all the bases covered.
I have a 25 GB sky drive through microsoft I should be able to grant access to.