The ProxySG or Advanced Secure Gateway (ASG) appliance is uploading logs more frequently than expected.
Access Logs accrue on the ProxySG appliance hard drive and eventually reach storage capacity. Symantec recommends configuring the appliance to trigger an upload ahead of schedule when data reaches a specified number of megabytes.
To prevent the Access Logs that do not have a configured upload client from triggering an early upload threshold, edit the default logs for each protocol that do not require uploading. Set them to <None> from the Configuration > Access Logging > Logs > Upload Client tab.