Are you talking about the zip file that Backup 5.4 makes when you tick the Output archive box.
I have a library of 1047.3 GB.
My MM.DB is 244,723 KB.
Backup 5.4 seems to behave for me.
I have just opened MM and I have the script run after a short delay.
As specified, in addition to the backup folder, it has made a zip file of 57,980 KB.
Hope that helps - or have I got the wrong end of the stick

