My "The Dude" server is running on RB750Gr3 and is located at USB flash drive. The Dude is running on rOS v6.45.1
Daily at night there is auto backup/export script working and it was working fine last year. Now it takes 2+ hours to make "/dude export file="disk2/Dude_configuration_backup_$date"
The database did not grow - the changes are minimal, all logging is switched off to minimize size of backup file.
Where could I start searching for the reason the backup process slowed so dramatically?