Schedule script to backup ASM config

That is not backup, but a PDF report. This is a wrong way of storing the event data. ASM has a very limited space on its own internal disk for logs. It is a security device, not a log storage. The event log export is only intended to be used as an investigation report.

You should be sending your ASM event logs to a remote syslog server (e.g. Splunk/ArcSight/QRadar/LogRhythm/AlientVault whatever you are using in your company)