Hello,
Could you check the Log.liveupdate (incase of SEP 11.x) and Log.lue (incase of SEP 12.1)
Log.liveupdate could be found under -
Windows 2003: C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate
Windows 2008: C:\ProgramData\Symantec\LiveUpdate
whereas,
Log.lue could be found under -
On Windows XP and Windows server 2003:
C:\Documents and Settings\All Users\Application Data\Symantec\Symantec Endpoint Protection\<silo_id>\Data\Lue\Logs
On Windows Vista, Windows 7, and Windows Server 2008:
C:\Program Data\Symantec\Symantec Endpoint Protection\<version number>\Data\Lue\Logs
Look for "estimated file size" and This file size will indicate the total package size that was requested from the SEPM.
NOTE: The value would in bytes, so if full content update will be around 77 MB (77,000,000 bytes).
Hope that helps!!