Dropbox is a file storage service. Install their application on all the computers you want synced and Dropbox will sync across these devices and save the files online too. A basic account comes with 2GB of storage. You can pay for more space, if you want. When you install Dropbox on your computer, it will create a folder called “My Dropbox.” Anything you put in this folder will be synced across all the devices that you have Dropbox installed on and saved on the Dropbox website. Dropbox stands out from the pack because of their mobile apps so you can use all your data on the go too.
Dropbox app available for Windows Phone: http://www.windowsphone.com/en-us/store/app/boxfiles-for-dropbox/6ca15174-a206-40ef-a792-d95d60098f9a