It seems that samba_backup script is not purging two files of backup. Samba4 has find $WHERE -name "samba4_*bz2" -mtime +$DAYS -exec rm {} \; and works for this files But backup also has two more files, please add this: find $WHERE -name "etc*bz2" -mtime +$DAYS -exec rm {} \; find $WHERE -name "sysvol*bz2" -mtime +$DAYS -exec rm {} \; Tested and works with .../source4/scripting/bin/samba_backup Thanks