servicenow max file size

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servicenow file attachment max is 1GB

https://www.servicenow.com/community/training-and-certifications/attachment-count-limit-and-size-limit-on-records-issues/m-p/2813367

but u can change it in sys properties, you can change it to any size 

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0718101

System Properties > Security.

The Security Properties page for the instance will appear.  Locate the property on the page with the heading "Maximum file attachment size in megabytes". In this field, you can change the