Attachment size limits
To set the maximum attachment size, use the Allowable file size (MB) attribute on the node in the Portal configuration. Due to the hard coded limit, the maximum size that is supported is 250 MB.
This size limit can be applied differently depending on your site's configuration.
If you are not using the advanced attachment feature, attachments are always added individually, so the size limit is per file.
If you are using the advanced attachment feature, then attachments are added individually when users are working with an existing record, such as a permit in the Instrument Detail widget. However, when a user submits a new application in the Add Instrument widget, all attachments are added in a single upload. Thus the size limit applies to the entire upload rather than an individual file.