OK Assuming your Laptop is Windows 10
Open File Explorer and click on "This PC"
Then click (at the top) "Map Network Drive" and you will get this window
In the "Foder" box type either
\\BRENNANB2\music
or
\\192.168.0.37\music
Note replace the 192.168.0.37 with the IP address shown on the start screen of your B2 the one you enter to get up the UI.
hit return
The system should ask you for an account - type in "root"
and a password - type in "brennan" (both without the " ").
and it should connect, making "Z" your mapped drive to the Brennan B2's music folder.
Of the 2 the IP address may be more reliable.
Fred