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[`FileSystemAdapter`](FileSystemAdapter) › [`appendBinary`](FileSystemAdapter/appendBinary)
## FileSystemAdapter.appendBinary() method
1.12.3
**Signature:**
```typescript
appendBinary(normalizedPath: string, data: ArrayBuffer, options?: DataWriteOptions): Promise<void>;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| <code>normalizedPath</code> | <code>string</code> | |
| <code>data</code> | <code>ArrayBuffer</code> | |
| <code>options</code> | [`DataWriteOptions`](DataWriteOptions) | _(Optional)_ |
**Returns:**
`Promise<void>`