Access denied error with My Book Essentials 3tb HDD

I’m trying to figure out why I’m getting an access denied message with my HDD when trying to create new files.  if I hook it up directly to my PC or through the ready share USB port of my netgear router I can.  But if I connect it through my USB hub or to my media player(hdi dune hd duo) Ican’t.  

Any ideas why this is happening?  No security settings are on

It’s not a good idea to connect with a hub it frequently causes problems. Your Media player may not support 3T drives and it may need to be formatted Fat32. Check out your media player specs.