Format the drive to FAT32 . Most head units cannot read NTFS or exFAT.
Some newer units have a "System Update" app with a QR code that links directly to the latest verified build for that serial number. Step 2: Preparing the Installation Media Alpha Coustic Update Firmware
You may need to re-select your car manufacturer’s logo in the Factory Settings menu. Troubleshooting Common Issues Potential Solution USB Not Detected Format the drive to FAT32
You will likely need to "re-learn" your steering wheel buttons in the "SWC" app. Alpha Coustic Update Firmware