How to sing to the car USB flash drive?

This question is too general, and the operation of each car's USB flash drive is different. There are several possibilities. 1, if you have your own SD card, you can take it out and install it on the SD card reader, which is equivalent to a USB flash drive, so that you can insert it into the computer to read data and copy the songs you want to listen to into the SD card. 2. If there is no card inserted, prepare a blank USB flash drive, copy the songs you want to listen to into the USB flash drive, insert them into the USB flash drive of the car MP3, and then copy them to the car according to the steps in the car MP3 manual. Because of the different USB flash drives of various cars, if you are unfamiliar with the operation, you can copy the songs to the USB flash drive first, find a car repair point and ask them to help you copy them.