I didn't do any of that. I just plugged my hard drive into the routers usb, then went to my pc and mapped the network drive (computer>map network drive) then my pc saw it and all the folders etc on the drive.
This need to be done on every pc which needs to see the drive.
For android devices i use an app called ES File manager, the app scans the network and finds any other pc's which are switched on and it also finds asusnetwork and the hard drive connected, then i can just stream films from the router hard drive, copy and paste from the hard drive to my device or between other devices.
Paul.