References: App data (overview docs), Accessing app data (overview docs), class, Application data sample.Ī. The lifetime of user data is not tied to any particular app and is controlled entirely by the user. User data, like pictures, videos, music, and documents, is stored anywhere else on the file system or the cloud, in libraries or in other locations selected through the file picker or folder picker UI. Roaming app data persists in the cloud independently (see the next question), and is shared between Windows and Windows Phone apps that have the same Package Family Name in their manifests. Its existence is tied to the existence of the app so that uninstalling the app deletes the app data from that device. App data is state that an app manages within its app data folders (Local, Roaming, and Temporary, along with LocalCache on Windows Phone 8.1). How does app data differ from user data?Ī.
Can I use my app’s installation location for app data?. What are the effects of app data versioning?. How does app data version compare with the version of the app itself?. Is local or roaming app data secured in any way?. What’s the difference between the folders and the settings containers in the class?. How does an app use the ms-appdata URI scheme?. What’s the difference between the Local, LocalCache, and Temporary app data locations?. How does the system handle conflicts in roaming app data that’s been modified on multiple devices?. How is app data affected during development with multiple build/deploy cycles?. What happens to app data when an app is updated?. What happens to roaming app data when an app is uninstalled?. How does app data differ from user data?. Both posts apply equally to Windows 8.1 and Windows Phone 8.1. In part 2, we’ll answer some common questions about files and file access. In this first part, we’ll cover your app data questions. Lately we’ve heard some recurring questions from you about files and app data, so we’ve compiled a list of those questions and provided some brief answers here. 
This post was written by Kraig Brockschmidt, Senior Program Manager in the Operating Systems Group
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