If you want all three websites have the same uploads folder:
For example, your want to store all the image files at c:\inetpub\wwwroot\uploads:
1. In site A, you create a virtual directory uploads and point it to the above location.
2. In site B, you create a virtual directory uploads and point it to the above location
3. In site C, you create a virtual directory uploads and point it to the above location.
If you leave it default, each web site will have its own uploads folder.
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