I have never got it to backup my files ever.
Their settings dialog integrates with macOS preferences and freezes while it scans for files to backup without giving me any status update. It uploads so damn slowly it’s pretty useless. If I was to move/rename things around it would take weeks more to reupload. Every time I try to ignore some files so it’s actually useful, it blocks my system prefs again and takes forever to rescan.
I honestly don’t know how anyone uses it.
Carbon Copy Cloner on the other hand is excellent software. Entire backups of 4TB drive in less than <20mins. And excellent support.