I have to my surprise just bought a 12 plate Sports Tourer Bi-Turbo and really like it, never thought I would own an Insignia after all the Vectras. My question is how do I move between MP3 folders on my USB stick, the Nav 600 just lists every MP3 on the stick, pressing info it shows the folder name of each album. The manual says I rotate the control wheel and the folders will show, I cannot see the folders listed whatever I try, anyone here have an answer?