There is no media in the device. Insert media in the device to continue. Write the following Label information on the DVD ...

There is no media in the device.
Insert media in the device to continue.
Write the following Label information on the DVD or other media, insert the media, and then click OK.

Label: {0}

This information will be used by Windows Server Backup to identify this media. Store it in a safe location so that you can use it for recovery.