Question

How do I change the storage class of an existing object in S3?

Answer 1

You can change the storage class of an existing object by copying it to the same bucket with the desired storage class. Below is an example using AWS SDK for Python (Boto3):

import boto3

s3 = boto3.client('s3')

def change_storage_class(bucket_name, object_key, storage_class):
    copy_source = {'Bucket': bucket_name, 'Key': object_key}
    s3.copy_object(
        Bucket=bucket_name,
        CopySource=copy_source,
        Key=object_key,
        StorageClass=storage_class
    )

bucket_name = 'your-bucket-name'
object_key = 'your-object-key'
new_storage_class = 'STANDARD_IA'  # or any other desired storage class

change_storage_class(bucket_name, object_key, new_storage_class)
print(f"Changed storage class of {object_key} to {new_storage_class}")