You can use the USB flash drive in car navigation through the OTG cable, and the steps are as follows:
1. Prepare an OTG data cable.
2. plug one end of the OTG data cable into the USB socket on the car navigation, and the other end into its own USB flash drive.
3. After plugging in the USB flash drive, we can find the settings in the interface of car navigation.
4. click on the settings and find the storage inside.
5. Click Audio and Music after clicking Save.
6. Then click the path above to find the SD card.
7. Then find the Music folder in the SD card.
8. export the music from the USB flash drive to the music playing menu, and then click play.