.BPK File Extension

Disc key file created by Nero products, including BackItUp & Burn and Burning ROM; contains a public key that can be used to verify the source and contents of a burned disc; typically distributed by the author of the disc so users can verify that the disc is authentic.

Nero SecurDisc Viewer is an application distributed freely by Nero for verifying SecurDisc contents. The application is included with Nero BackItUp & Burn and Burning ROM, which both are part of the Nero Multimedia Suite. However, Nero discontinued the software.

A BPK file may also be a backup of an Android app installed in the Windows version of BlueStacks, an Android emulator. It is used to migrate an app and all its associated data from one version of BlueStacks to another. For example, you can use a BPK file to migrate an app and its data from BlueStacks 4 to BlueStacks 5.

The BlueStacks emulator allows you to install and use Android apps on Windows PCs. If you want to upgrade from an old version of BlueStacks to a newer version, you can migrate your apps to the newer version using the BlueStacks AppData Migration Tool (after enabling Android debug bridge in BlueStacks' settings). Doing so saves a copy of your apps and their associated data as a set of BPK files.

To migrate the app and app data a BPK file contains to a different version of BlueStacks for Windows:

1. Enable Android debug bridge in BlueStacks' settings and note your four-digit port number.
2. Open the BlueStacks AppData Migration Tool and select Restore app data to BlueStacks.
3. Enter your four-digit port number in the ADB port field and select Next.
4. Browse to and select your BPK file.
5. Select Restore.