The backup of these files failed: u-0000xx.db, xx=01 to 14

Hello,
Recently, I always get this message: The Backup for these files failed: u-0000xx.db, xx from 01 to 14. If I would start a new backup, I would get the same message for a file u-000015.db. Bu a file search on my disk does not show any of these files. Does anyone know, what these files are and if this backup faulure is serious?

Hi @hschiffe,

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting:
https://support-en.wd.com/app/ask

@hschiffe

DB File Extension - What is a .db file and how do I open it? (fileinfo.com)

u-000015.db - Search (bing.com)

Do you every do a search using your favorite search engine?