In one sentence, describe what the following article is about:

If you log into Windows 8.1 with your Microsoft Account, you'll link your OneDrive (formerly SkyDrive) storage with your Windows computer. Windows will automatically save all new files to your OneDrive storage, while keeping copies on your local storage as well. You can change how your files are synced and whether or not you want to save documents to OneDrive by default.  Open the Charms bar and select "Settings". Select "Change PC settings" and then "OneDrive". Click the "File storage" option. You will see your available OneDrive storage space, and you can toggle saving to OneDrive by default on or off. Click the "Sync settings" option to change your OneDrive sync settings. You can sync your PC's settings so that they are automatically applied to any computer you log into, as well as a variety of other settings such as web browsers and personalization. Windows 8.1 includes a OneDrive app that you can use to manage your OneDrive online storage. You can also use the app as a Modern UI File Explorer.  Open the Start screen and type "onedrive". Select "OneDrive" from the list of results. Right-click or swipe files to select them. Use the menu that appears at the bottom to manipulate the files. You can move, rename, copy, paste, delete, and perform other basic file management tasks. Click the "OneDrive" button at the top to switch to your local files. You can then perform the same actions on all of your local files and documents.

Summary:
Understand how OneDrive is integrated with Windows 8. Adjust your OneDrive sync settings. Use the OneDrive app to manage your OneDrive files.