I am able to plug in a USB thumb drive. MP3 files are ready by my 2009 Acura TSX without any problem.
I can browse the folders, etc.
With my Android phone (Epic) I can't do it.
I think there is just something about where the files are or the format. I am determined to find out what it is and post again.
My initial suspicions are:
a) The TSX stereo knows to look down 1 level but not further than that (I will test today)
b) There is something about the file structure on Android (I doubt it because I can browse in Windows
I will repost if I find the answer, but I suspect this problem can be solved without too much difficulty!