Do not put the files in a folder. Place them directly in the "root" (the main area) of the USB drive.
Many Android head unit enthusiasts share stable firmware builds for specific chipsets. Alpha Coustic Update Firmware
You will likely need to "re-learn" your steering wheel buttons in the "SWC" app. Do not put the files in a folder
Plug the drive into the primary USB port (usually labeled USB 1 or "Media"). Trigger the Update: You will likely need to "re-learn" your steering
If you can tell me the of your unit or the chipset type (e.g., TS10, T3L), I can help you find: The specific Factory Settings code for your device.
Many Alpha Coustic units will detect the files and ask "System Update Found. Start?" Click OK .
Use a high-quality USB 2.0 or 3.0 drive (8GB to 32GB).