> For the complete documentation index, see [llms.txt](https://evoffer.gitbook.io/evoffer-installation-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://evoffer.gitbook.io/evoffer-installation-guide/model-3/fusionlink-integrated-carplay-and-android-auto-system/firmware-update.md).

# Firmware Update

Please follow the instruction to perform a firmware update

You need to prepare the following items:

1. USB Flash Drive OR microSD in **FAT32** format
2. Firmware Update file (our technician will send you a `.zip` file)

### Log Export

1. Extract the `.zip` file and put the folder `bv3d` into the root of the USB Flash Drive
2. Insert the USB Flash Drive into the USB port or the microSD directly into the card slot on the device.
3. You will see a pop-up on the display, running from 0% to 100%.
4. Remove the USB Flash Drive or microSD from the device.
5. The update is completed.

{% hint style="danger" %}
For `board` update, it may take up to 30-45 minutes. You will find the display goes black after step 3. Wait patiently for 30-45 minutes, disconnect the power & microSD from the device, then reconnect power and reboot the car and the update will be completed.
{% endhint %}


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