---
title: "Upload a part by copying data from an existing object as data source"
slug: "upload-a-part-by-copying-data-from-an-existing-object-as-data-source-boto3-tg"
tags: ["5.4"]
updated: 2026-10-28T01:54:14Z
published: 2026-10-28T01:54:14Z
canonical: "docs.vastdata.com/upload-a-part-by-copying-data-from-an-existing-object-as-data-source-boto3-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 by copying data from an existing object as data source

The [upload_part_copy()](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.upload_part_copy) method uploads a part of a multipart upload by copying data from an existing object as data source.