What should I do if I can't use the USB port to play music?

I bought a music USB online, but my car can't read it. What format should I change it to?

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.

What should I do if I can't use the USB port to play music?

Can I use a USB drive to listen to music?

Where should I insert the USB drive in the Hongqi HS7 to play music? I've tried both the slot under the dashboard and the one at the back, but it shows "USB not mounted". What should I do?

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.

Why can't I play music from a USB on my Chery Jetour X70 Plus?

Can the Cetus car play music online, or can it download apps to play music, or is it only possible to use a USB drive?

What formats does the USB interface support? I'm planning to use a USB drive to play lossless music, and I'm not sure if it supports APE format.

The 2020 model only has one USB port. If you plug in a USB drive to listen to music, you can't connect the car kit. The USB extension ports you bought aren't working, and the USB in the armrest cigarette lighter also doesn't support USB drive for music or connecting the car kit. Do you have any suggestions for using both the USB drive for music and the car kit simultaneously?