View files from multiple (filtered) nodes
Here is a different approach, give this a try:


Ok, get rid off all the FILTER CRITERIA except for File: type = image
Under Advanced, add RELATIONSHIP of [Your Entity Reference Field
Name] make sure you select the one that says, "Referecing" and NOT "Referenced".
For your FIELDS File: name and Content: title, click on them and for
relationship select your Content Referencing Content from [Your Entity  Reference Field Name]





Under Advanced, add a CONTEXTUAL FILTER of nid. 


Select provide default value
Content ID from url (This will automatically pick up the nid (node id) from the Band node/page.






Lastly, would be to add SORT CRITERIA and add the date field.