Long story short, I tried a couple players for my Pi3+ and once got onto Volumio I threw the other memory cards away, very well done!!!
Only issue bothering me is that every time I reboot Voumio looses my default option to output through USB and I have to re-choose it before I can play music (find screenshots attached), might it be some trouble with plugins?
Thank you
Giovanni
p.s. very good job!!!