DropBox is a free file drop off/transfer/sharing service. You install the app on all of your devices and computers. All the files that you put into your dropbox will be available to you no matter which device you connect with. You can even connect and retrieve you files via their webpage.
You will have to create a free account to use their services. You will then get a nice chunk of space for moving your files around. If you find you need more space you can always pay for more.
All of the DropBox apps are free.
Get it at the App Store: https://itunes.apple.com/us/app/dropbox/id327630330?mt=8
Dropbox web site: https://www.dropbox.com