# Scale up Amazon MSK Standard broker storage
<a name="msk-update-storage"></a>

You can increase the amount of EBS storage per broker. You can't decrease the storage. 

Storage volumes remain available during this scaling-up operation.

**Important**  
When storage is scaled for an MSK cluster, the additional storage is made available right away. However, the cluster requires a cool-down period after every storage scaling event. Amazon MSK uses this cool-down period to optimize the cluster before it can be scaled again. This period can range from a minimum of 6 hours to over 24 hours, depending on the cluster's storage size and utilization and on traffic. This is applicable for both auto scaling events and manual scaling using the [UpdateBrokerStorage](https://docs.aws.amazon.com/msk/1.0/apireference/clusters-clusterarn-nodes-storage.html#UpdateBrokerStorage) operation. For information about right-sizing your storage, see [Best practices for Standard brokers](bestpractices.md). 

You can use tiered storage to scale up to unlimited amounts of storage for your broker. See, [Tiered storage for Standard brokers](msk-tiered-storage.md).

**Topics**
+ [Automatic scaling for Amazon MSK clusters](msk-autoexpand.md)
+ [Manual scaling for Standard brokers](manually-expand-storage.md)