To enable NAS on B2 and PC, if you can follow the steps below you should be able to get NAS running between your PC and the B2. I have included three images ('Snips') of the Windows 'Map Network Drive' process to hopefully make it easier to see what should be happening.
1. On the B2 -- 'Main menu' check the scrolling display for 'IP Address' and note this down (something like '192.168.1.56').
2. On the B2, check your current version of software; on the B2 Remote, press 'Info' twice - good if your version is 09 Jan 2020 or newer.
3. On the B2, go to 'Settings->Maintenance->Start NAS' (you only have to do it once). This is to enable NAS on B2.
4. On your PC, open Windows Explorer as shown in Snip-1 attachment.
In the left side panel, locate the icon 'This PC' (or could be your PC name as in the example in the attached snips (in my case 'PL-Laptop').
5. Right-click on this icon and select 'Map network drive'.
6. In the 'Map Network Drive' panel, fill out the fields as shown in Snip-2 attachment. Use the IP address that you noted in step 2 above.
7. In the 'Folder' field, enter '\\192.168.1.56\music' without the quotes but substitute your IP address for the one shown here.
8. Tick box 'Reconnect at Sign In'.
9. DO NOT select 'Browse'; select 'Finish'.
10. A Windows Security panel 'Enter Network Credentials will open up. Enter 'root' for User and 'brennan' for the password (without the quotes) as shown in Snip-3 attachment.
11. Tick box 'Remember my credentials' and click on 'OK'.
An Explorer window should open up showing your B2 'music' files on your PC..
You now have a NAS connection running between your B2 and your PC. You can manipulate, move, copy music (and other files) to and from your B2.
Good luck! If you have any problems, let us know here and we'll try to assist.
Peter.