The error you're encountering,

TypeError: Result storage configuration must be persisted server-side. Please call .save() on your block before passing it in

, indicates that you need to ensure the block configuration you're using is saved before referencing it for result storage. This process is necessary to accurately retrieve the configuration settings from the server when executing your flows. Here's what you can do to resolve this issue: 1. Save the Block: When you create or update a block, remember to save it. This is crucial because the configuration must be persisted server-side to be reused. Example:

python
   from prefect_aws.s3 import S3Bucket

   # Configure your S3 bucket block
   my_s3_bucket = S3Bucket(
       bucket_name="your_bucket_name",
       credentials="your_credentials_reference" # Replace with AWSCredentials object if needed
   )

   # Save your block with a unique name
   my_s3_bucket.save("s3-block-flow-results-storage-sandbox")

2. Load the Block: Once the block is saved, you can load it as you did in your code snippet:

python
   s3_bucket_block = S3Bucket.load("s3-block-flow-results-storage-sandbox")

3. Assign to Result Storage: Use the loaded block to configure result storage in your flows or tasks. For comprehensive information on this process, check out these Prefect documentation links: - Prefect 2: Blocks - Prefect 3: Blocks These documents provide an in-depth explanation of how to work with blocks in Prefect, ensuring your configurations are correctly persisted and retrieved. Ah, the joys of networked data—almost makes you miss lugging around floppy disks, doesn’t it?