> ## Documentation Index
> Fetch the complete documentation index at: https://docs.revoengine.com/llms.txt
> Use this file to discover all available pages before exploring further.

# storage.uploadPart()

> Public low-code contract, signatures and examples for storage.uploadPart.

## `storage.uploadPart()`

Uploads one part into an active multipart upload session.

Notes:

* Unavailable with `readOnly: true` (throws an error).
* Renews the durable session lease before processing and after committing the part.
* Accepted part manifests remain durable across worker restarts.

### Overloads

```ts theme={null}
static uploadPart(
      storageUploadSessionId: string,
      partNumber: number | StorageBinaryUploadPartInput,
      data?: StorageBinaryUploadPartInput,
    ): Promise<StorageUploadPartResult>;

static uploadPart(
      namespace: string,
      storageUploadSessionId: string,
      partNumber: number | StorageBinaryUploadPartInput,
      data?: StorageBinaryUploadPartInput,
    ): Promise<StorageUploadPartResult>;
```

### Examples

```ts theme={null}
await storage.uploadPart(storageUploadSessionId, 2, {
  data: nextChunk,
  dataEncoding: 'utf8',
});
```

#### incremental numbering

```ts theme={null}
await storage.uploadPart(storageUploadSessionId, {
  data: nextChunk,
  dataEncoding: 'utf8',
});
```

#### repair a specific multipart chunk

```ts theme={null}
await storage.uploadPart(storageUploadSessionId, 7, {
  data: repairedChunk,
  dataEncoding: 'utf8',
});
```

See [all storage methods](https://docs.revoengine.com/low-code/reference/storage.md) or [runtime basics](https://docs.revoengine.com/low-code/overview.md).


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