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Showing content from https://cloud.google.com/storage/docs/changing-storage-classes below:

Change object storage classes | Cloud Storage

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This page describes how to change the storage class of objects within a bucket through rewriting the object.

• To learn how to change object storage classes without rewriting an object, see the Object Lifecycle Management feature.
• To learn how Cloud Storage can automatically manage your object's storage classes, see the Autoclass feature.

In order to get the required permissions for changing the storage class of an object through rewriting the object, ask your administrator to grant you the Storage Object User (roles/storage.objectUser) role on the bucket.

This role contains the permissions required to change the storage class of an object. To see the exact permissions that are required, expand the Required permissions section:

• storage.objects.create
• storage.objects.delete
• storage.objects.get
• storage.objects.list

You might also be able to get these permissions with other predefined roles or custom roles.

For instructions on granting roles on buckets, see Set and manage IAM policies on buckets.

Complete the following steps to change an object's storage class:

Individual object storage classes cannot be set through the Google Cloud console. Instead, use the Google Cloud CLI.

Use the gcloud storage objects update command with the --storage-class flag. For example:

gcloud storage objects update gs://BUCKET_NAME/OBJECT_NAME --storage-class=STORAGE_CLASS

Where:

• BUCKET_NAME is the name of the bucket containing the object whose class you want to change. For example, my-bucket.
• OBJECT_NAME is the name of the object whose class you want to change. For example, pets/dog.png.
• STORAGE_CLASS is the new storage class for your object. For example, nearline.

For more information, see the Cloud Storage C++ API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage C# API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage Go API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage Java API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage Node.js API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage PHP API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage Python API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

For more information, see the Cloud Storage Ruby API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

1. Have gcloud CLI installed and initialized, which lets you generate an access token for the Authorization header.

2. Create a JSON file that contains the following information:

   {
     "storageClass": "STORAGE_CLASS"
   }

   Where:

   • STORAGE_CLASS is the new storage class for your object. For example, nearline.

3. Use cURL to call the JSON API with a POST Object, request:

   curl -X POST --data-binary @JSON_FILE_NAME \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "Content-Type: application/json" \
     "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME/rewriteTo/b/BUCKET_NAME/o/OBJECT_NAME"

   Where:

   • JSON_FILE_NAME is the path for the JSON file that you created in Step 2.
   • BUCKET_NAME is the name of the bucket containing the original object. For example, my-bucket.
   • OBJECT_NAME is the URL-encoded name of the object. For example, pets/dog.png, URL-encoded as pets%2Fdog.png.

1. Have gcloud CLI installed and initialized, which lets you generate an access token for the Authorization header.

2. Use cURL to call the XML API with a PUT Object request:

   curl -X PUT --data-binary @OBJECT \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "Content-Type: OBJECT_CONTENT_TYPE" \
     -H "x-goog-storage-class: STORAGE_CLASS" \
     "https://storage.googleapis.com/BUCKET_NAME/OBJECT_NAME"

   Where:

   • OBJECT is the local path to the object whose storage class you want to change (you must re-upload the object when changing storage class with the XML API). For example, Desktop/dog.png.
   • OBJECT_CONTENT_TYPE is the content type of the object. For example, image/png.
   • STORAGE_CLASS is the new storage class for your object. For example, nearline.
   • BUCKET_NAME is the name of the bucket containing the object you are rewriting. For example, my-bucket.
   • OBJECT_NAME is the URL-encoded name of the object you are rewriting. For example, pets/dog.png, URL-encoded as pets%2Fdog.png.

• Learn about available storage classes.
• Change object storage classes with Object Lifecycle Management.
• Explore other Cloud Storage data lifecycle features.
• Learn about object metadata.
• Learn how to use request preconditions to prevent race conditions.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-10-02 UTC.

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