Excluding files/folders from scheduled scans

I am using a client version of SEP 12.1.5 provided by my employer on my home machine.

I have over 9 million files on my machine, the vast majority of which never change. I would like to exclude them from my weekly scheduled scan, which now takes about 15 hours to complete. I admit that I do not understand the documentation on exceptions, but it appears that none of the available exception types (Security Risk, SONAR, DNS or Host File Change, Application) apply to such things as the videos, photos, music, and ebooks that I would prefer not be scanned.

How do I exclude such files from scheduled scans?

Thanks!