The .pre file extension is related to the SonicWALL products and used for their SGMS syslog files.
PRE file extension - SonicWALL SGMS syslog
What is pre file? How to open pre files?
File type specification:
The PRE file extension is associated with the SonicWall a security hardware and software developed by SonicWALL company. The .pre file stores SGMS syslog.
SonicWALL was acquired by Dell.