This page lists all the Amazon S3 buckets owned by S3 accounts that Virtualmin is configured to use on the Cloud Storage Providers page. Buckets can also be created and edited from this page, and the access control and auto-deletion lifecycle rules that apply to files within them edited.
Virtualmin's backup process will automatically create new buckets as required, but in the default S3 storage location. Creating a bucket from this page allows you to select a storage location that is closer to your Virtualmin system.