What exactly is the Windows 7 App Data folder used for?

What exactly is the Windows 7 App Data folder used for?
IT GuyNetwork EngineerAsked:
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exactly what is says on the tin :)

applications store data in there like microsoft folder has signatures, ost's, psts, nickname file etc.
apple computer stores itunes information etc...

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Brian GeeCommented:
User customizations for applications are typically stored here (e.g. the Outlook signature, proof and mail profile are housed in a folder in the AppData folder). In Win7, the AppData folder takes place of the Application Data folder that existed in Windows XP, et al.

AppData or Application data is a hidden folder in Windows 7. It is to protect user data and settings from any unwanted change or deletion. It contains many important data such as program settings, IE cookies, toolbar settings, IE browsing history, temporary files created by applications, Libraries, send to items, templates and many more.

(see the link for more info)
Jackie ManIT ManagerCommented:
AppData folder is an important component of your user profile in Windows 7.

"A user Profile is a collection of personal data associated to a specific user. If you use a user ID to log in Windows 7, you will have a profile created by the system that is dedicated to you. No one else but the users who have the admin rights can access them. It’s a probably the most important data you are care about when using a windows computer.

Other than documents, pictures, or videos, a user profile also has a series of folders that stores some important data for specific applications. For example, Microsoft Outlook stores many settings, configuration files under AppData folder. Because of that, I often need to access those folders to either troubleshoot or copy over the settings. And most of the time, it wasn’t so easy because these folders are set to hidden by default. But here is a quick trick that I found and used to have saved so much my time."

Source: http://www.windows7hacker.com/index.php/2011/03/how-to-access-user-profiles-appdata-folder-the-easiest-way-in-windows-7/
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