---
title: "Use an existing or external bucket"
description: "Create a Model Repository on one of your own EOS buckets, or on an EOS bucket that another account owns, with its bucket name and keys."
content_type: "how-to"
product: "model-repository"
platform: "TIR"
url: "/tir/model-repository/how-to/use-an-existing-or-external-bucket/"
topic: ["create-and-connect"]
---

# Use an existing or external bucket

Create a repository on a bucket that already exists instead of a new one. Choose **Existing EOS Bucket** for a bucket in your own account, and **External EOS Bucket** for a bucket that another account owns.

## Before you begin

- A TIR project in Delhi or Chennai. The bucket must be in the same region as the repository.
- Permission to create model repositories in the project. A Member gets it through a policy that allows creating for the Inference service. For **Existing EOS Bucket**, a Member also needs a policy that allows reading datasets. Without it, there are no buckets to choose, and TIR gives no reason.
- For **External EOS Bucket**, the name of an E2E Object Storage bucket in the same region. You also need an **Access Key** and **Secret Key** attached to that bucket, and they must be able to read and write it. This option works only with E2E Object Storage buckets.

## Use one of your own buckets

1. In **Model Repository**, select **Create Repository**. Fill in **Repository Name** and **Model Type** as in [Create a repository](/tir/model-repository/how-to/create-a-repository/).
2. Under **Storage Type**, select **Existing EOS Bucket**. A note says "This option will use the selected EOS Bucket to store the model artifacts".
3. Under **Bucket**, choose one of your account's EOS buckets in the current region, including buckets created in Object Storage and buckets that another repository already uses. To make a new bucket first, select **create** under **Bucket**.
4. Select **Create**.

TIR gives the repository its own access key for the bucket, and that is the key the repository shows. The repository's files count toward the bucket's storage as before.

## Use another account's bucket

1. In **Model Repository**, select **Create Repository**, and fill in **Repository Name** and **Model Type**.
2. Under **Storage Type**, select **External EOS Bucket**. The notes say that you can use an EOS bucket that someone else owns. They also say that you need the bucket's **Access Key** and **Secret Key** to reach it.
3. Enter **Bucket Name** (up to 50 characters), **Access Key**, and **Secret Key**. Both key fields hide what you type, and you can show them to check it.
4. Select **Create**.

## Check the repository

The repository is created. On its **Overview** tab, **Bucket Type** is **Existing EOS Bucket** or **External Bucket**. The storage type is fixed once the repository exists. To use different storage, create a new repository.

For help with a refused create, see [Troubleshooting Model Repository](/tir/model-repository/troubleshooting/model-repository/).