# Expanding the pool

> Growing the storage pool onto drives that are not part of it yet.

Source: https://docs.univrs.cloud/management/system/storage/expand/

When drives that are not part of the [storage pool](https://docs.univrs.cloud/management/system/storage/) are fitted, the pool can grow onto them. Select the expand button at the top right of the pool, or **Expand pool** in the pool's menu in the list. When the pool cannot grow, the button is grayed out; hover over it to see why.

_The expand button_

_Expanding the pool_

The new drives are added in groups laid out like the pool's own, here a mirror of two drives. The pool's current groups are at the top and the new ones below them. A drive that does not fill a whole group is shown under **Unused** and stays out of the pool. The bar shows the capacity now, what the new groups add, and the capacity after.

Select **Expand**. A confirmation names the drives that will be erased; tick **I understand and want to proceed** and select **Expand** again. A notification shows when the pool has grown.