So I know the router seems to be working fine and the drive works fine. Router works with other USB drives and the 5TB Elements drive works on every PC or every other router I have.
Router is updated to latest official firmware. I have done restarts and resets.
The problem is that when connected to either USB port it detects the drive and even shows a shared drive "sda1" on the network. However there is nothing in it.... no files or anything else (the drive has 3TB of data on it). I can connect to it, I can map a drive in Windows to it... but there is just nothing there. It shows 0kb used of 0kb total.
Is there any way around this or do I just need to return the WRT1900? I guess I assumed that if other 1900AC routers work with this drive that the WRT1900 would too, but I could get the benenifit of the high storage speeds.