Hi
From my experience some thoughts:
0. When powering on BDP, give time to finalize all boot sequence. This is done when you see a square sign on the VFD
1. After setting the NAS, click on Update link that appears in left top corner of web interface
2. Give time to update music library. Update is running all time when on VFD display, second line, first letter is U
3. Click on the Media Player text in right top corner; this will change your view
4. on the new view, in the right panel, you should see a panel with some folders, first should be music_on_your_NAS; click on it, not on the + sign
5. this should open folders structure on your NAS, navigate by scrolling and clicking on the name of sub-folders, not on +;
6. choose your desired folder to be played by clicking on the +; on the left panel you should see tracks from that folder; click on a track and will start to play
After you get comfortable with this interface, you may create playlists
Scratch drive is a USB stick that BDP will use to create swap files and store libraries that will create if you want to create album databases
There is also simpler ways to play music that I would recommend:
- for PC: install
Cantata- for smartphone/tablet: install a MPD player