bktruss wroteSo I'm guessing this is an issue not worth addressing as this must not be a feature at this time or there is no fix.
I think there is a fix, but someone with more Linux savvy than I will have to provide it. On all of these Linux-based music server/players, there is a "user" defined that has the appropriate access to all the various components in Linux (which has a rather complicated file and services access and rights system). Generally, that is not "root" or the admin user. I think the problem happens when you create a file structure on your USB device on, for example, a Windows computer, and that sets a certain permissions matrix for the drive, file structure, and individual folders and files. Then you plug that into the Linux machine, and ... oops, sorry, the pertinent Linux internal user who runs the music system doesn't have the proper access, so it can't "see" the files on the USB device.
For me, it's not acceptable to have to go into the Linux box via SSH with a terminal program and tediously change all the file permissions so it works. You CAN do this, but what happens when you update your USB disk again with some added new music...To make it worse, by default Linux treats USB disks and USB memory sticks differently.
Instead, the code in the Linux box should be smart enough to check for new USB devices, make the appropriate file changes on the fly, and just have it "work"!
I know this is possible, as I went another direction with a little $49 wifi router, which is of course Linux based, and it works like a charm. Plug my USB disk in, and voila, all the music folders and files are visible.