<!-- Do not edit this file. It is automatically generated by API Documenter. --> [`DataAdapter`](DataAdapter) › [`appendBinary`](DataAdapter/appendBinary) ## DataAdapter.appendBinary() method Add data to the end of a binary file. **Signature:** ```typescript appendBinary(normalizedPath: string, data: ArrayBuffer, options?: DataWriteOptions): Promise<void>; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | <code>normalizedPath</code> | <code>string</code> | path to file, use [normalizePath()](normalizePath) to normalize beforehand. | | <code>data</code> | <code>ArrayBuffer</code> | the data to append. | | <code>options</code> | [`DataWriteOptions`](DataWriteOptions) | <p>_(Optional)_ (Optional)</p><p> 1.12.3</p> | **Returns:** `Promise<void>`