# S3 Partition Configuration

To configure a S3 partition in CopyStorm/Medic, provide connection information for the target S3 bucket.

CopyStorm will use the AWS Default Credential Provider Chain to connect to S3. Environment variables, Java Properties, IAM Roles, etc… can be used to authorize CopyStorm for S3 access.

![](https://4057376488-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsbSqfKw3vSfr8qwXao4j%2Fuploads%2Fgit-blob-1b4845db8cb9aac47b024e87d572b94f5deae5a0%2Fa91189ef-2024-04-16_14-06-37.jpg?alt=media)

To initialize the partition, CopyStorm/Medic will:

* Copy field data for the selected fields into the target bucket, using the folder name as a prefix.
* DROP the database storage used by the selected fields.

When CopyStorm replicates new or updated records, field values for the selected fields will be kept in files in the target bucket.

Record data is kept in a nested structure generated using Salesforce Ids.


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