storage_media/security/ir_rule.xml
<?xml version="1.0" encoding="UTF-8"?>
<odoo noupdate="1">
<record model="ir.rule" id="storage_file_media_rule">
<field name="name">Storage File for Media</field>
<field name="model_id" ref="storage_file.model_storage_file"/>
<field name="domain_force">[('file_type','=', 'media')]</field>
<field name="groups" eval="[(4, ref('storage_media.group_media_manager'))]"/>
</record>
</odoo>