Configuration with a separate repository for metadata to example.com pointing to file_upload data source, custom upload and download URI, maximum file size set to 10MB, expiration done every 6 hours and grouping of slot folders by user jid.

Complex configuration example. 

upload() {
    logic {
        local-only = false
        max-file-size = 10485760
        upload-uri-format = '{proto}://{serverName}:{port}/upload/{userJid}/{slotId}/{filename}'
        download-uri-format = '{proto}://{serverName}:{port}/upload/{domain}/{slotId}/{filename}'
    }

    expiration {
        period = P6H
    }

    repositoryPool {
        'example.com' () {
            data-source = "file_upload"
        }
    }

    store {
        group-by-user = true
    }
}

Configuration for high availability in a cluster with common storage at /mnt/shared and both servers available as upload.example.com

Example configuration with HA. 

upload() {
    logic {
        upload-uri-format = '{proto}://upload.example.com:{port}/upload/{userJid}/{slotId}/{filename}'
        download-uri-format = '{proto}://upload.example.com:{port}/upload/{domain}/{slotId}/{filename}'
    }

    store {
        path = '/mnt/shared/upload'
    }
}