Use iTunes to sync information on your iPhone, iPad, or iPod touch with your computer over Wi-Fi. Syncing allows you to share information between devices. For example, if you buy a movie on your computer, you can sync to add the movie to your iPhone.
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Dropbox adds new tools to make syncing smarter
Dropbox is adding a suite of features to its file-hosting services to provide more syncing tools for app developers and make it easier for end users to access their data across devices
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