Thanks Shawn, for your quick reply, but I was specifically referring to the file backup sets & their respective backup periods (under manage space). As a note, I don't include system images with my file backups. Does the 30% also apply to those accumulating weeks of file backups? I didn't think so as I once got a notice to delete some of those backup sets since I was running out of space - just trying to avoid this needed intervention when space is low on those files.
I might be misunderstanding you. If so, please excuse