Your USB drive is likely formatted incorrectly, or the files are buried inside a sub-folder. Re-format to FAT32 and ensure the files sit on the main root directory.
First, a reality check. The “8227L” refers to an older MediaTek-based processor (MT8127/MT8227) designed originally for low-end tablets. Car stereo manufacturers adopted it because it was cheap. These units rarely have more than 1GB or 2GB of RAM. 8227l android 12 firmware download
What do you see in your settings?
Flashing a car head unit carries inherent risks. A mismatched firmware file can permanently brick the device, disable the touch screen, or cause a black screen. 1. Identify Your Exact System Information Your USB drive is likely formatted incorrectly, or