# Attach/Upload Files to a Phase Subtask

This feature allows users to attach files to the subtasks so the assignee can get more details about the subtask, or the assignee can send completed works for review.

### Steps to Use:

* Select a **phase**. The **phase modal page** opens.
* Click the **down arrow button of** the **Subtask.** &#x20;
* You will see the **Subtask list.**
* Choose which **subtask** you want to **attach/upload files**.&#x20;
* Click the **Add** button.
* A **box** will open. Click the **Upload button.**
* Choose **files** from **your system** & **select** them.&#x20;
* The **attachment files** will be **uploaded**.

<figure><img src="/files/to6iw6kg1fxMnFJHTIpu" alt=""><figcaption><p>Attach/Upload Files to a Phase Subtask</p></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.onethreadapp.com/6.-managing-items/6.1-phases/6.1.2-phase-modal-activity-page-manage/subtask-in-phase-item/attach-upload-files-to-a-phase-subtask.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
