Hi @zmsoft ,

Since you are working in the unity catalog environment, go with External Location or Volume.

Please read this article:
https://community.databricks.com/t5/technical-blog/how-to-migrate-from-mount-points-to-unity-catalog...

As the first step you need to configure a storage credential and to assign proper permissions to your storage credential (Storage Blob Data Contributor role to User Assigned Managed Identity configured in your storage credential).