USB is abysmal. I tried it first. I could not “drill down” artist->album->track with it. I could go artist->track, but when a lot of your stuff is classical, most tracks are named “allegro” and without the album context (i.e., which symphony it is), it’s utterly useless.
And even when it’s not classical, going to an artist simply jumbles all of the tracks together from their…possibly a dozen…albums into a random mess. Now I have to scroll and hunt through dozens of tracks to find the one (!) track I actually wanted to hear.
Also every time the car started, it reloaded the entire library and began playing what it deemed to be the first track in the library (some fairly obscure work by Bach).
Absolutely dogsh*t useless.