Vitaly, that's correct. You pay once for multi-region. In fact, multi-region storage is cheaper than dual region. This is because multi-region allows gives us flexibility to place the data most efficiently among all our data centers in the region. Also, you will pay egress fees when reading data from a multi-region bucket (unless you are copying data from one GCS bucket to another within the multi-region). But with a dual region, there is no egress fee when you read the data from one of the two regions included in the bucket location. So in a way, you are trading off cheaper storage for more expensive IO between multi and dual region locations. Does that help?
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