Hi,
Thank you for posting in Symantec community.
Refer this article:
Disk Space Management procedures for the Symantec Endpoint Protection Manager
http://www.symantec.com/docs/TECH96214
Changing the log settings to reduce the size of the database.
http://www.symantec.com/docs/TECH105238
By reducing content revision and log settings you can save the disk space but content revision setting depends upon number of client and log settings are kept for the audit. So keep these points in mind before making any changes.