yes, by all means. It's always best practise to backup on another system assuming this system crashes with BSOD :-).

Hello,

Yes, You could store the SEPM Backup on other systems.

Few Articles:

Backing up the database and logs

http://www.symantec.com/docs/HOWTO55107

How to back up, restore, and/or move the Symantec Endpoint Protection Manager (SEPM) and embedded Database to another disk or system

http://www.symantec.com/docs/TECH102738

Symantec Endpoint Protection 12.1: Best Practices for Disaster Recovery with the Symantec Endpoint Protection Manager

http://www.symantec.com/docs/TECH160736

Symantec Endpoint Protection 11.x: Best Practices for Disaster Recovery with the Symantec Endpoint Protection Manager

http://www.symantec.com/docs/TECH102333