node template filefield render

I have created 2 content types A, and B. I have referenced field B3 to A1. I have 4 fields in A the forth is a file field (pdf's).
I have created a new template for node B and started to render entity's with {{content.field_1}} {{content.field_2}} ... and also I have added referenced field's with
{{ node.field_3.entity.field_1.value }} (field_3 is the referenced one and I bring A1)
{{ node.field_3.entity.field_2.value }} (field_3 is the referenced one and I bring A2)
{{ node.field_3.entity.field_3.value }} (field_3 is the referenced one and I bring A3)

My problem is I can not bring the file field {{ node.field_3.entity.field_4 }}. To render a local filefield it is enouph to {{content.field_5}} but the referenced one is a problem.