You can create a new backup group with zero retention.
(I can't remember, but you might have to leave versions exist at 1)
Rebind the files to the new group
Exclude *.MP3 (Etc)
Include *.MP3 newbackupgroup
run backup.
after backup has completed, remove the include and leave the exclude.
Doug Tho
Jack,
You can create a client option set that binds all *.MP3 and *.WAV files to
a new management class that has settings of "1 1 0 0" for the retention
values, and assign it to all of your nodes. Let one backup run, then
change the include to an exclude to expire the last active versions of