Improve third-party storage CSI driver documentation

Signed-off-by: Cooper Tseng <[email protected]>

Author: brandboat

docs/advanced/csidriver.md

@@ -76,6 +76,14 @@ For more information, see [VM Backup Compatibility](https://docs.harvesterhci.io
 
 :::
 
+:::note
+
+If the storage class is not in the CDI built-in capabilities list, annotate it with `cdi.harvesterhci.io/storageProfileVolumeModeAccessModes`. Consult the CSI driver Helm chart documentation for instructions on how to annotate the driver's storage class.
+
+For more information, see [Containerized Data Importer (CDI) Settings](./storageclass.md#containerized-data-importer-cdi-settings)
+
+:::
+
 1. Login to the Harvester UI, then navigate to **Advanced** > **Settings**.
 1. Find and select **csi-driver-config**, and then select **⋮** > **Edit Setting** to access the configuration options.
 1. Set the **Provisioner** to the third-party CSI driver in the settings.