USB drive not accessible

Hello everybody!
I have GL-MT3000 and usb drive connected to it. And Macbook.
Everything woking well until internet is down. From this moment USB drive is not accessible.

my connect link looking like this - smb://GL-MT3000
All IP settings is default. DNS from provider.
But link smb://192.168.8.1 also does not work, so I think that DNS is does not matter.
I hope that something just doesn`t cofigured in a proper way, please tell me what actually I have to do to watch movies from USB drive without internet.
Thanks in advance.