How to Read the NBF Format
Files with an NBF extension are backup files created by cellphones manufactured by Nokia Corporation. When creating a backup of the contents of your Nokia phone's memory card, the device's software creates a single NBF archive containing every file stored on the card. You can open NBF files and view their contents by using Windows Explorer, the Windows operating system's file manager.
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Instructions
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1
Open Windows Explorer by clicking on "Start" and selecting "Computer."
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2
Locate the NBF file on your computer by using the file browser in the application's left-hand pane.
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3
Right-click on the file and select "Rename."
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Change the file extension from "NBF" to "ZIP". For example, if the original file is named "backup.nbf", rename it to "backup.zip". Press the Enter key on your keyboard to confirm the new name.
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Double-click on the file to view its contents.
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