Why can't I play songs through the AUX adapter cable in the 2012 Volkswagen Multivan armrest box?

Why can't I play songs through the AUX adapter cable in the 2012 Volkswagen Multivan armrest box?

I have a 2014 used XV, and the USB port in the armrest doesn't recognize P3 and P4 USB drives. The DVD also can't play videos. I don't have the manual, so I'm not sure if this navigation unit doesn't have these functions or if there's a malfunction.

The USB port in the armrest of a 2012 GLS can't charge your phone. Are there any other places to charge your phone?

Do any of you use a USB drive to listen to music? Does the USB drive need to meet certain requirements? Why can't the songs I downloaded on my previous USB drive play? I used a card reader with a memory card, and it worked before, but now it always switches back to the radio interface.

I was looking for a good sedan, and I went through the usual headache of choices like anyone else. I looked at the Sentra and the Civic—each had something I liked, but also something that made me hesitant. The Sentra felt a bit too quiet for me—I’m still young—and while the Civic was tempting, I just couldn't fully buy into it. I randomly walked into a Toyota showroom, and right there in front of me was the Corolla. I took it for a test drive, and honestly, the sales team was incredibly polite and respectful—unlike the staff I’d dealt with at other dealerships. In the end, I was convinced and bought the hybrid Corolla. After a year of use, the car has been comfortable and smooth to drive, with no major issues. But it’s not without its annoyances—like the sluggish, outdated screen and the old-school head unit, so I replaced them. Even the seats and the center armrest would get dirty easily, so I had them covered in leather. The headlights were halogen, so I swapped them for LEDs. The horn also sounded weak, so I changed that too. In terms of performance, it's decent—not a rocket, but more than enough for daily commutes. At speeds over 120 km/h, the car felt a bit floaty, so I upgraded the wheels and tires from 16" to 17", which really improved its stability. The most impressive thing, hands down, has been the fuel consumption—it once dropped to 3.9L/100km! But after I accidentally reset the system, it now reads 5.3 and I can't figure out how to get it back. Space-wise, it's fine—comfortable up front, and okay for two people in the back, but three will feel cramped. The one thing that really bugs me is the A/C, especially for rear passengers. There aren’t effective rear vents, and airflow is a bit weak during summer. I enjoy tweaking my car, so I’ve done a lot of modifications—brakes, tires, wheels, lights, sound system, and a few small accessories. Overall, though, I’m satisfied. My advice for anyone planning to buy one: don't go for it just because everyone else is. Buy it because you’re personally convinced. Compare prices and features carefully. At the end of the day, the Corolla is a solid, respectable car. It won’t let you down, but it’s not perfect—there are things that need a bit of work, depending on your preferences and how willing you are to spend a little more after buying it.