# Increase/Decrease Node Disk Size
In the **GreenNode** **vDB OpenSearch** service, you can easily adjust **Node Storage Size** to optimize storage capacity and ensure system performance. **Currently, we only support increasing storage size** when there is a need to expand.
To increase storage size for nodes in an OpenSearch Cluster, you can:
**Step 1:** Access
**Step 2:** Select **Cluster** under the **OpenSearch** section
**Step 3:** Select the icon 
on the cluster where you want to resize storage, then select the action **Resize Node Storage size**
**Step 4:** The **Resize Node Storage size** screen is displayed. Select the storage size you want to use for the node or enter the desired capacity **(GB)** for the node.
**Step 5:** Select **Resize** to confirm the request. If you are a prepaid user, the system will display the next payment steps.
After completing the steps above, the new storage size will be updated on the node and applied immediately.