---
title: "Upload a part in a Multipart Upload"
slug: "upload-a-part-in-a-multipart-upload-tg"
updated: 2026-10-27T17:23:03Z
published: 2026-10-27T17:23:03Z
canonical: "docs.vastdata.com/upload-a-part-in-a-multipart-upload-tg"
---

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

# Upload a part in a Multipart Upload

The [upload_part()](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.upload_part) method uploads a part in a multipart upload that was already [initiated](/docs-5-3/docs/en/initiate-a-multipart-upload-s3cmd-tg).

After uploading all parts, the upload needs to be [completed](/docs-5-3/docs/en/complete-a-multipart-upload-boto3-tg).