HELPaudit- not all files backed up

Did a backup of music and picture files to passport ULTRA 2 TB. The total file size didn’t look right compared to the C drive
Whn I looked in music for example, 277 artists of Ultra and 373 on C drive so I’m missing files
Thoughts- using WD smartware SW



Have you tried restarting the software and let the software scan the drive again?

Also note, that the software won’t perform the backup on system files.