RuneAudio debug info

(In an earlier thread I sought and got help with setting-up RuneAudio with a particular approach in mind.  Time marches on and I'm back at the same point again but this time with a somewhat altered approach.  Because of that I thought I'd better start a new thread rather than hark-back to the earlier one;  besides, I hope I've learned a few lessons in the meantime).
I originally installed RuneAudio directly onto my ODroid C1+ (ie I'm not using an ODroid SD card pre-loaded with Ubuntu or Android).  I'm now aiming to control the C1 with a Samsung Galaxy Tab3 (Android ver. 4.4.2, kernel ver. 3.4.5-3952694 22/1/2015).
I'm able to bring up Rune's web interface on the Tab3's browser.  But that's where I've become stuck - for three days now.  Despite all my considerable efforts I cannot manage to install the network source I want to use.  It's a network share named My Music I've created on my desktop computer in Windows 10, into which I've put my existing (pretty meagre) music collection.  Right-clicking on it and selecting <Properties - Sharing> the network path is given as \\DESKTOP8\My Music;  it's shared with "Everyone".
I ought, SURELY, to be able just to enter "DESKTOP8/My Music" as <Remote directory> and that should be it?  But I've tried every different way I can think-of to format that file-path and every time a red cross is displayed in response.  I'm forced to conclude that there's some other explanation than syntax alone which must lie behind this behaviour but I can't even begin to guess what it might be.
Any suggestions?