Of course its uploading at times, THAT IS WHAT IT IS SUPPOSED TO DO.
It could be uploading all your achievements, your recorded game clips, parts of your games to store on the cloud, your game saves, your game settings,
game progress, offload cpu processes, syncing with skydrive, etc...
No one has any idea yet just how large these things are. Who knows a game save could be 1meg or 500 megs, same with
the auto saved game clips. Same with other things.
My advice is to just leave it alone and connected and let it do its thing like it was intended.
The cloud will allow you to take not only your Xbox profile, but your pins, home screen, content, save games and achievements with you wherever you go. "Basically," Penello says, "any Xbox One anywhere in the world is your Xbox."
For example, your Xbox Live profile will live online. That means that you can access all of your games and content from any Xbox One just by signing in. When you’re at a friends, you can quickly sign into your account meaning your achievements and position on the leaderboard are always mobile.
The cloud will also power title and system updates in the background so that whenever you go to play, your stuff is ready to go. Likewise, it will always run matchmaking so that gamers can find a multiplayer instance faster
Xbox One automatically manages data stored on its internal hard drive through sychronization with Microsoft's online cloud servers, the firm has explained.
The console's automated data management process will offload game files such as save data and settings to the cloud whenever it's available (for Xbox Live Gold subs only), making them available to the user on any Xbox One they sign into.
"Xbox One was designed to make storage management automatic," a Microsoft rep told Game Informer.
"For saved games, settings, and other information that Xbox One customers save to the cloud, space is virtually unlimited. On the internal hard drive in each Xbox One, games and apps can be uninstalled or reinstalled instantly with the click of the Xbox One menu button.
"Saved games and settings information is retrieved from the cloud for any game as its being reinstalled. By being smart about how storage is managed, Xbox One keeps everyone playing, watching, and sharing their entertainment content rather than worry about limitations. You can also see how much storage any app uses by pressing the menu button on that app," they explained.
But, they go on to stipulate, offline versions of your newest data will also be stored should a cloud connection not be available.
"Everything stored locally on the console is just a cache that enables you to play offline, track achievement progress offline, and more. When you reconnect we will sync your progress in the game and sync your achievements," said the rep.
"If you remain connected to the cloud, your game progress will always be available in the cloud so you can pick up where you left off in the game from any Xbox One you play the game on; if not, it is stored locally on the console."