amazon – In the CloudWatch panel, how to include the metric search in formula / sum

I am trying to configure a CloudWatch panel to monitor the total storage usage of S3. I can add each BucketSizeBytes metric and then use an equation SUM (METRICS ()), and see the total, but if I use a SEARCH FOR() to include all MetricName = "BucketSizeBytes", the SUM() It does not return any value. Is there anything else I should add to my formula or search for this to work?

This is probably easier to explain with a screenshot

screenshot