Some sort of cloud storage would be probably the easiest way to transfer files, but I dont like using google cloud or Dropbox. Once you upload contenet to them think about it they can see all that you upload. I have nothing to hide but still i would prefer a personal cloud. If you do have an old PC lying around you should look into ownCloud.org | Your Cloud, Your Data, Your Way!
It makes your own cloud server! Its a really nice application to help you out, but if you want an easier setup then what else you could do is just use a flash drive to transfer them.