Why updates fails when trying to update Secure Folder in Samsung Galaxy Note8?
Samsung is aware of this symptom which may appear on Galaxy Note8 devices and this issue has already been resolved with a software update which will be available in the coming weeks.
Therefore, please check for updates to your device SW regularly via the Smart Switch PC or FOTA.
Samsung encourages users to keep your software and apps updated to latest version.
Alternatively before release of new software, you can download the Secure Folder of the latest version from Galaxy Apps.